A little here and a little there, I happened to hear part of a Christian broadcast today, by Ron Dart, of CEM, and he was on this very subject, and he was saying how the minute Mark or one of the writers would finish a manuscript, it would be rushed off to have copies made, and then they were sent it to all the Churches, so they already knew what the word said, long before there was a canon or an organized church system in effect.
By the way, most of it was memorized, word for word.
This "hot-off-the-press" hypothesis can't be substantiated because we don't have any of these supposed copies nor do we have any report of them. That the Church finally settled on just FOUR gospels, however, suggests that these got into circulation comparatively early and were widely circulated. Commerce and correspondance moved around the Med. in the First Century about as fast as it did it in the 19th Century. I don't rule out that they were available, at least in some form, during the first generation, since modern speculations--which put most of them into the 70-85 period seem to me to be just that--speculations.