I always thought snubs come on nomination day. This season it would be Harmony, Heart of Rock n Roll, The Wiz, How to Dance in Ohio, and other shows that got zero Tony love.
Since actual vote numbers are not published nor will it ever be published, remember that some of these races will be close and can be won by only 1 vote. For Best Musical, since there are 5 nominees, technically it's possible for the Tony winner to only get 21% of the votes!