Yep, nightstopping really isn't a new thing for Easyjet at all. There's never been a firm and steadfast reluctance to nightstop AFIK. In fact if it wasn't for the bases across Europe I reckon there would be more night stoppers. There has to be a business case for it though, like everything. BA, LH etc don't nightstop crew to be nice. Certainly on a short haul basis it's all to do with getting early flights into the business centres and feeding into the network. Easy doesn't interline or feed and the European bases often assist in getting early departures and arrivals. That said, nightstopping isn't as expensive as everyone makes out.
Nightstops were also prevelent in Easyjet's infancy aswell.