I think it runs at 30fps, but only because it has ALOT of effects going on.... 3D grass, High Res and Big Player Models, HDR lighting, Motion Blur during gameplay, and much more....
but since it has these effects with the 30fps, it seems smoother.
although I think the original Tackle Ally clips were 60fps....but as development continued and they added more players on the field and just more stuff they probably had to lower it. Especially when they implemented splitscreen multiplayer.
I had no problem with Madden 07 when it had most of those effects but ran at 30fps...but after 07 they took all those effects out to reach 60fps....sure it looked smooth, but the animations seemed off.