Mine don't. Some wrap a turn or two of electrical tape if they feel loose.
I too have read about wrapping your mags with electrical tape a turn or two. The husband went with the 17 round mags for his 9c and uses the x-grip and he really likes it. Be careful while loading the mags though.. The husband has had issues with his finger getting pinched. I too can get a finger pinched loading my 12 rounders into my mags for my 9c. It has cost me enough blood, so I try to remember to extend all non used fingers away when reloading. I reload with gusto though..
The husband just started using the 17 round mags without the x-grip. He actually really likes it. He said that he does not have to worry about getting pinched now.
I agree it is a good idea to get used to all the mags that you are going to use with your gun. Especially if it is going to be a carry gun.
I've had one for a while now (on a 40c)and will be getting another. I had to do the elec tape method b/c it was too loose on the mag. Having the full size grip via X Grip has pretty much done away with my 10rd finger mags, as I carry with flat bottom and go to extended next (kept in jeans coin pocket). The flat base is what really makes it sub compact and not compact. My advice is get two X Grips now with an extra full size mag. If you're carrying the mags as back up ccw, you'll appreciate the extra rounds when the time comes. And when qualifying (if you do) its nice to get back at the 25 with a mid size gun plus less reloads.