I had this dilemma and after reading that insanely long gaming benchmark scores thread that started around the time the new MBPs came out I decided to go with standard res.
In many cases people were only noticing a small difference in FPS, maybe 5 or so. Depending on the game though some people were getting a difference 10-20 fps, which can definitely hurt, especially as more graphically demanding games start to hit the market (in my case, final fantasy 14 online).
Also, you are getting an i5, which has the 256gb gpu, which will probably have to work a little bit harder to get the gpu to reach those resolution requirements.
In the end I'm glad I chose the standard resolution. I'll never have to wonder if my gaming performance would be better if I went with the standard res. Not to mention I already squint quite a bit when laying in bed with my laptop on my lap, smaller fonts would just be bad for me, but I don't have the best eye sight either.
When apple releases MBP's with higher end graphics cards that can handle large resolution bumps then I will consider investing in a machine with higher res.