The thing I don't understand is why they had to go with "infinite speed" for warp 10. Why not just make it approach an infinite energy requirement, but have a finite speed (sort of like the speed of light does). Especially considering that traveling at this infinite speed in threshold somehow kept them in the Delta Quadrant. What the heck was that in Where No Man Has Gone before then? Infinity plus a few? Very strange definition of infinity here. Unless we are to believe that they somehow lapped the universe...an infinite number of times and somehow by pure chance ended up back at the same galaxy, relatively close to their starting location, which is even more absurd. Even if it wasn't a bad episode, the depiction of Transwarp was so self-contradictory that it is difficult to take much away from it. Clearly they have a misunderstanding of what infinite really means. Since it is clear the creators didn't understand the concept of infinite speed, I see no reason that we have to definition of warp ten. They weren't traveling infinite speed, so this episode essentially tells us, contrary to the characters assertions, that warp ten is a finite speed.
OK -- I'll get off my soapbox now