If you were wondering whether JetBlue has been able to avoid the trap of growing too quickly, wonder no longer. The airline is considering whether to defer some of the airplanes it has on order for the next few years. JetBlue is scheduled to take delivery of 17 A320s this year and in 2007, and 18 Embraer 190s this year and in 2007. Yes, that’s a lot of planes. And as they’ve watched virtually every other upstart airline do, they’ve probably begun to grow faster than they could manage. On the positive side, they recognize this pretty early, and they should have no trouble finding owners for these popular aircraft types. But still, all is not rosy in JetBlueville.