I think different, ZX and Naphalm.
I think, shark needs no excuse for not having hit a release date on spot. He does it free, he does it in his spare time and he does it with quality in mind.
If he said: "I will release the next game in 3 months!" there will be numerous people who are VERY disappointed if there is no new game 3 months later. MUCH more disappointed people than there are now.
So I think it's best to do it as it is done now: The games get released when they are done. No need for excuses or anything. But more fun, time to aim for quality and detail. We like the games that much, because they are so well done, so detailed and not at least because we can feel a bit of the fun it was to create them. I don't want to loose that for getting a release date..