@rob
My thought is, Patrick Byrne started looking for help to implement Medici, and he was blown away by what Counterparty had accomplished. Plus he liked the developers. Almost like meeting a significant other, Patrick was intoxicated by all of the qualities he recognized, and the promise he foresaw. But bit of time went by, and Patrick learned more and more, and realized there were a few rough edges with Counterparty; plus there were tons of other smart people and great platforms he could work with (even though he clearly dismissed a few early on, for various reasons that might not have been related to the quality of the technology). I think he may have realized there was no rush to get married to a platform so quickly. The space is so immature, that, as much as I feel a connection to Counterparty, I almost felt uncomfortable with Patrick's very quick decision to run with them for such an important project.
Anyway, you all probably are more up on the details than I am, but that's my take. I would really like to see Medici succeed by not committing to any platform too quickly. In a year or two, we all may have totally different views on the different ways Medici should go. I'd say Patrick should really take his time, allowing platforms to develop, mature, and prove they are up to the task.
I have a bit of a hard time wrapping my head around Medici being like Tokenly. But wouldn't that be something, if Tokenly ends up being a model Patrick uses!
I think @adam was referring to Medici being built in a way where it wouldn't be tied to being used on one specific platform. Tokenly for example could be plugged into (with some work) Mastercoin, NXT, ext..
@kerbos5 was talking with me about it, and he made an interesting point that this also could be due to the fact that the Counterparty devs may have wanted everything open sourced as for Overstock might not have seen it that way. That is pure speculation, but a possibility.
But I agree that Patrick probably did get jumpy because he saw the only established 2.0 community thus far.