In my area the restaurants do generally seemed to be booked up Monday-Wednesday – in fact, there was a post on our local Facebook group from someone who had their partner’s birthday upcoming, and she couldn’t get a spot because she underestimated how much EOTHO would impact things.
I’ve also noticed some of my family members, who rarely eat out, have done so a few times this month.
That being said, I’m not sure how many of the people going Mon-Weds are the people who would have normally gone Fri/Sat and simply moved the day. Very hard to say!