We have never had any problems using Easyjet either, and agree with the aircraft and staff being as good as any other airline.
Regarding speedy-boarding, I think it may work well on the outbound flight, but on the return, you could be first on the bus, which will then fill with young families, then zone A, before being bussed to the plane, so I don't think Easyjet can guarantee you will be first onboard coming home. In fact, Colin has just said that they don't guarantee it on their website.
We always presumed it was first come first served for zone A, but we could well be wrong, too!
Hope you have a good holiday anyway, Sue!
lynn xx