My understanding is that there might be a delay of a few weeks or so from when it is manufactured to the test firing, but once it is test fired and the case collected, the gun is given a quick cleaning, and the fired case and gun go into the box, and the box is put into the vault until it is time to go to the distributor.

So, there is a good chance that your pistol was made in early 2010. if you have the box, on the end label there is a date code that tells you when the pistol was manufactured. There is a four digit number on the label (I can't remember at this time what S&W calls this number), but it should say something like, for example, "0053". This example woul show that the pistol was made in 2010 (the first "zero") on the fifty-third day of the year (the 053).

Hope this helps.