How do you know there's been a massive uptake when you don't have any numbers? Aren't you just guessing?
Like I said, I have no numbers, so fundamentally it is just a guess.
And of course this is just a guess too - "It's been long enough now that lots of people have moved their projects over."
Maybe we could step from wag to anecdote if there has been a straw poll at some recent Ruby conference asking which version the attendees were using?
And I'll grant that you're part of the community on your say so.
But being "part of the community" doesn't magically enfuse you with knowledge about what proportion of the community is using what version of Ruby. To be educated about that is to count the numbers.