Possibly hijacking the thread somewhat, but here goes;
As Rainboe says once airborne, the flight directors give "wings level" in the B737. Presumably in the airbus, you get something else as I remember last winter getting stuck at the holding point on 09R at LFPG and had to sit and watch about 8 heavys takeoff. All the airbuses took off and tracked the runway QFU and all the boeings started drifting off towards 09L.
The question is, how does this apparent difference affect parralel runway operations - I wouldn't personally have fancied going around off 09L in an airbus when a Boeing was taking off from 09R.
Or have I missed something?