You're 90% there
NO, you blithering idiot, I am not 90% there, you are 90% there. All I am doing is waiting for you.
You could have said:
We're 90% there
And then we would both be happy.
I even took the time to submit feedback to Microsoft on this (and much more politely than I stated it here).
Who wants to guess if my feedback was ever acted on?