"George Patterson" wrote in message
news:Kzwae.1657$Sk6.243@trndny08...
[...]
IIRC, they load 747s through multiple doors at JFK.

They do at Logan as well (or at least, they did ten or fifteen years ago
when I was flying through there).

I don't know how common it is, but I have certainly seen 747s being boarded
across multiple jetways/doors at a time in the US. Of course, much of the
time they are boarded through a single door as well. And it does take
longer. Somehow, I think when the A380 is flying commercially, folks will
manage.

Pete