Well, I hope the lull in suicide bombings is because people who would have been suicide bombers or would have assisted them and encouraged them might have decided its not a good idea, and that they will turn to more effective methods which don't involve carrying out atrocities.
But I have a horrible feeling it might be just because there's been so much going on that it's been a lot harder to do, and there've been other targets closer at hand. In which case it's likely to start all over again, but with the number of potential volunteers for it probably enormously higher.