Is there any indication that Data can run unusually fast? I can see how he could run at "normal" speeds for a protracted period of time if he needed too.
If I need to, I can type about 120 words per minute, but usually I don't. Might be the same with Data, it would make him appear casually inHuman.
I think it's a reasonable conclusion. Data's 'metal muscles' make him much stronger than any human, so, similarly, these would make Data faster than any human, by a long shot. He can move his hands at super speed, so why couldn't he move his feet and legs at super speed, if he truly desired?
I figure it's like comparing the top speed of a horse to the top speed of a Corvette. The horse has no chance.