46% global and 27 USA? Damn the us people are even more tech illiterate than I would've guessed. I suppose the 85+% market share of the iPhone among teens has something to do with it.
A big enough hit if 42% of Chrome users switch to a different browser.
However, I wouldn't be surprised to see that people with adblock are more likely to use something other than Chrome. And some people will stay with Chrome and deal with the lack of adblock.
Which makes this even more annoying. Like you have good chunk of the world using your browser with ads, but you still want even more and are still taking these types of scummy actions.