Carrying on from what my ATC colleagues have already said, I feel I have to point out that Ryanair's "expeditious" taxiing can help us all out, and you don't hear too many complaints then! How many times have you seen a Ryanair crew dawdle on a backtrack, miss the turnoff or cruise into the apron when asked to expedite. Not many complaints when you're No.2 to the Ryanair!!
Their crews do tend to be quick on the approach, but as stated above, it is really a failing of ATC not to have applied some speed control if that's going to present a problem. In most cases (at our unit anyway) you can rely on them to close up a gap if you need them to, or slow down if you need them to - simple as that!
That said, I've only twice ever flown as a punter with FR, and don't plan to do it again in the near future! Sorry guys, but it was a bit too much like a school trip - I'm a bit old for that these days.