I should post a sticky about this on a PC section or something.
Everybody who has VSync on, should be forcing Triple Buffering through D3DOverrider or some other tool.
VSync is nice in getting rid of the weird effects of the half-frame rendering, but if your card isn't producing a constant FPS rate matching your monitor's refresh rate, you'll get the highest framerate that divides your monitor's refresh rate with no remainder, that's still lower than the FPS produced from your graphics card.
So, if you turn on VSync on a 60Hz refresh rate, you'll get 60FPS as long as your graphics card is producing at least 60 FPS, but if it doesn't, and does anything between 30 and 60 FPS, you'll get 30FPS, because 60/2=30.
Triple Buffering makes sure to pre-render frames, so you get a framerate much closer to what your graphics card is able to produce. It's like having VSync, without the FPS lock. Your framerate will still be limited to your monitor's refresh rate, you won't have any splits due to incomplete frames, but you'll get much better performance than just VSync.
Here's a really good explanation on the matter: http://hardforum.com/showthread.php?t=928593
And here's RivaTuner, which includes D3DOverrider in it's tools subdirectory after installation: http://www.guru3d.com/content-page/rivatuner.html
As for the OP, yes, jersey movements are CPU intensive, although they shouldn't be. It's just bad optimization on 2K's part. Although I'll disagree with benji on the requirement of an i5 to get 60FPS. I've posted this a lot of times already, but my E6750 which only has 2 cores and was overclocked to 3.2GHz handled High Player settings and moving jerseys just fine, along with everything else maxed out, 58-60 FPS constant, VSync and Triple Buffering on. Granted, I had a GTX460 on there, but it was only ever utilized up to 30%, so it didn't make much difference.