Well, yes and no. The earliest complete copy of the NT we have dates from about AD 350, but we have examples of collections of books from much earlier than that, including portions of the gospels from the second century. The actual canon was finalized in the fourth century, but all the writings themselves were completed before the end of the first century.
That said, I quite agree with you about HSB's methodology (or lack thereof, as the case may be). Here's an old example that you may or may not have heard of:
"Judas...went away and hanged himself." Matt. 27:5
"Go, and do thou likewise." Luke 10:37
"What you are about to do, do quickly." John 13:27
A prophetic message for Camping's followers??