"familiarize himself with local procedures"
The STAR speed of 250kts is the procedure! If AUH approach (124.4) tell you to disregard the speed restriction, that is their decision. If the ACC gives a speed for sequencing, they are obliged to remind you to comply with the STAR. It is quite obvious when people ignore ATC instructions. The level of professionalism by (some) crew in this region astounds me - and not in a good way!