I don't think Folston runs a 4.6+, somewhere in the mid to high 4.5s sounds about right. Cierre wasn't that fast, he just had killer vision and hip fluency. As does Folston, but Folston also possesses elements of power and can block at an adequate level. He's kind of a jack of all trades, master of none kind of back.
Tony isn't fast, but is so insanely powerful that it doesn't matter. He's not going to hit the corner and be off to the races like Prosise would, but he can bust it right up the middle and do considerable damage to the opposing back 7. He's still only 210, and he'll get bigger and stronger, and considering he has this much power already, it's a scary thought of what he'll be like when he hits 225-230.