Ahh, Leo... what would I do without you?
Of course, you're completely right. I just put this to the test and got the same results as I did when I looked at the change in Lightroom.
Brilliant!!!! Going from max sync speed to 1 stop faster shutter speed exhibited the same -2.7 EV and then -.9 and I would imagine that it's going to be the same 1 stop loss for each stop of increased shutter speed, give or take a few tenths of a stop.
I thought your were changing the ss on the meter. Without that it wouldn't have worked. Glad that it is working fine.