I know for a fact Ryanair fly very fast approaches into DUB. I operate into there occasionally from LGW, and on one occasion we had a line up clearance cancelled after the ATCO reported an aircraft at 13 miles out doing 300 knots! We waited, and sure enough a Ryanair 737 came into view on the approach.
I believe a lot of their guys manange the energy differently on the approach, in that they dive off the height, get down to say 3000 feet, and then lose the speed when level before intercepting the glide. Fair enough I guess providing its safe, but the risk of a rushed approach is a lot higher.