It's not unexpected. Serious projects need more than a few days to move off Github; and there's some overlap between HN users and users who would move their tiny projects off Github on a Sunday afternoon.

That being said, it's way too early to tell how this will evolve trust-wise. Microsoft has a tremendous deficit of trust in the open source community. Younger folks probably don't realize how deep it runs; most of my friends and colleagues who were involved in FOSS in the late 1990s and early 00s wouldn't touch anything with Microsoft on it with a ten-foot pole -- not just because of prejudice, but because fool me once etc etc.. And I wasn't thrilled about hosting code on someone else's computer before, either, but now I'm even less thrilled about hosting it on Microsoft's computer.