We have both fleets, and yes, on the boeing we usually do bleeds on packs on departures. On the airbus fleet it is usually a packs off departure. However i never noticed any pressure bump during the airbus departures at all. On a boeing it can be a pretty strong thing, on the airbus it simply doesn't happen.
Can't really see any danger for your ears there. Much more dangerous is flying with an undetected cold, that can really harm your ears.