The recommended Airbus way is to "use rudder to align the aircraft with the runway heading during the flare while using lateral control to maintain the aircraft on the runway centreline." Wing tip or engine scrapes at 18 degrees on A320/321 and 16.5 degrees on A330. So there's a bit of margin there.
I've found that all 3 handle quite well in crosswinds, particularly the A330 and A321. A330 - inertia does the job - no need for wing down. A320/321 - same again really, so long as you don't float too long then it's fine. IMHO, there's no "right" or "wrong" way - whatever lands your plane!!!!!
