I wouldn't read too much into it, code not being 100% ready could certainly be part of the reasons. Even if they decide to withhold the source code for a year or two it's an understandable business decision.
A year or two?! That could hardly be called an open source project. I hope people stay cautious and don't invest their money in it
at least until the source code is released, and until we know how decentralised Ripple really is.