The A330 will follow a profile from cruise to aproach altitude, depending on what descent speed one has entered in the FMS (generic term). In my company 0.80/300 KIAS. Then 250 KIAS below 10000 like everyone else.
If you one day see an A330 on the ramp, notice the very long wings. They are very clean and willing to fly ;-)...
When will ATC stop expecting aircraft to be able to descend and reduce speed at the same time. Cant be done on the A330.
Hope it helped.....