From what I see, Stelios et al. are geniuses, as they have made a mint flying cheaply to somewhere near to where they wanna go. Good on them, I fly them, and will do in future. It doen't mean I won't fly BA etc, depends where I'm going.
On a side line, I love Easy/Ryanair/GO from an ATC aspect anyway, they certainly know aircraft performance when you need it!!!!!!!!