A 'cycle' doesn't constitute a thought. I would be willing to bet that a human brain can actually process speech faster than a computer can. (not sure how you'd prove that.)
Computers aren't sentient NOW because they aren't fast enough yet. At least, that's a staple of science fiction. It's only when the computer gets 'big' enough...gets 'fast' enough that they can start to be sentient. So saying when a computer becomes sentient it will suddenly "think/talk" magnitudes faster than us is a non-sequitur.
Now, what they will have is photographic memories. They'll have a huge advantage in the 'random access memory recall' area. I assume it's possible they'll be better at 'hand-eye' coordination. (Not that she had any hands in 'her'.)