Say between 10 and 11. OWB tried it yesterday and liked it.
I take it by your "clock face description" you are referring to "cross-draw" (butt forward on weak side) versus "calvary draw" (butt forward on strong side).
Cross-draw is so dangerous that is it not legal to use in any NRA sanctioned match and it is so dangerous that properly trained law enforcement officers are not allowed to use this method (or, at least discouraged from doing so in agencies that have actually given thought to the problem).
In match use, presentation results in the barrel pointing at all of the competitors to your left (or weak side) as the pistol is presented and swung into line with the target. I do not know about you, but I will not tolerate having a gun pointed at me at any time, for any reason, under any circumstance. I want to go home after the match at least as intact as when I arrived. On most well-run ranges that allow presentation from the holster, this method is simply not allowed, and it will get you kicked out, perhaps permanently.
As far as LE use is concerned, cross-draw puts the weapon in a position where it is actually more convenient to the opponent facing you than it is for you. It is even worse for these unfortunate horizontal shoulder holsters, which are very convenient to the opponent, not to mention that everyone behind the wearer gets to look straight into the muzzle of a loaded weapon. A circuit court marshal where I lived was nearly killed when a large prisoner knocked him down, got on top of the marshal and was latched onto the SIG .45 Auto in the marshal's horizontal shoulder holster. On a less threatening level a gun store in St. Louis had armed employees carrying the the brand of nylon holsters they sold, one of which was a horizontal shoulder holster. Anytime I visited, I always felt a knot in my stomach when I was able to look right into the muzzle and see a .45 hollow point facing me in the employee's auto pistol.
There are very narrow exceptions to this rule of no cross-draw, such as always sitting in a car like a chauffeur or executive protection vehicle driver, helicopter or other pilot, a desk sergeant, etc. For ordinary citizens, a better option, if you feel the need, is to learn how to lean forward and draw while seated in the manner taught by Massad Ayoob and demonstrated by him on one of the TV shows. If you are too heavy or simply unable to bend forward enough in the confines of the car, then a quick on and off cross-draw is a better answer. That way, when you leave the car, you can re-holster in the proper holster. Carrying a weapon can sometimes be a cumbersome procedure, but if you are not willing to go to the trouble to do it properly, then I would say don't do it at all.
So, cross draw is generally dangerous to both bystanders and to the user, except for very limited cases such as chauffeurs or helicopter pilots, desk officers or similar workers who are seated all day.
A local officer near where I live insisted that he could protect his butt forward draw better from a grab attempt. When he actually went to a training that dealt with weapon retention, he was called out by the instructor at the beginning of the class. The instructor had the hapless officer explain his reasoning behind his mode of carry, and the long-serving, but little trained officer from the little department, impatiently explained his retention method. The instructor warned him to get ready for a grab attempt. The poor guy did so, and the instructor had the poor officer's heavy barreled Model 10 in his hand pointed at the officer's chest in about one second. We had all warned him, but he would not listen. The next shift, the officer had changed to strong side and worked another 15 years wearing his weapon the preferred way. The best that can be said is that he never got killed and, to the officer's credit, he "sucked it up" and admitted to everyone he was wrong and learned from it. I always like this officer, and I was quite proud of his ability to admit he had been wrong for the 15 years before that day. Although I have not seen him in many years, we remain friends.
Remember that just because holster makers offer cross-draw rigs it should not be taken as a good idea. Ken Null has this to say on his website when he describes his excellent XDR model, designed for drivers to carry the weapon at a steep angle while seated for easy access from the seated position: "While I do not adhere to this mode of carry, I have heard your call of need and answered it."
In my opinion, cross-draw makes me think "inexperienced cowboy" and reminds me of the Rod Steiger character in the original movie "In the Heat of the Night."
Read the book "No Second Place Winner" by Bill Jordan. The book explains it all in far better detail than I have done.