Whenever I read about "uncalled for ATC delays", I smile. Of course we are not perfect (no one is), but if you have 12 planes, someone must be first, and someone must be 12th, you can't make everyone depart at the same time. Sure, you can accomodate for requests of one crew, but it almost always means delays for other. Same goes for arrivals - the APP unit at my place usually vectors for 5-6 miles finals, and offers visuals whenever possible. But if you have a peak of arrivals, someone will have to accept a 20 mile final, speed reductions and delaying vectors. Most probably he will think its uncalled for.
You don't need to be a pilot to understand the cost of fuel these days. But there's something wrong if you report low fuel when you're not even been airborne, and the taxi took 10 minutes more than usual. Also I know perfectly well pilots use different techniques to save fuel, but entering a 3km long runway for backtrack in high traffic load and driving along at 5kts without noting the ATC prior to entering the runway that you're on 1 engine (while being told to expedite before entering) is not the best thing to do. And you should also understand that while this single crew might have saved a bit of fuel (was not so as they were moved down the sequence due to their action), they also cost other waiting a/c more fuel. You're not alone.
BTW, this was just to show that it happens everywhere, not only at RYR (and for obvious reasons). But while a good deal here will jump at everything said about RYR, they will defend "good actions of the aircrew" if it is a different airline.