I'm the OP. Andrew, thanks for responding here. I have a ton of connected IssuedAuthSubTokens apps, but I've most of them are just accessing my Calendar, Contacts, etc. The only one that that has access to my Gmail is Baydin (Boomerang) which, as mentioned in the post, I am writhe to remove. But I wouldn't think that one connected Gmail app would be enough to cause slowness, would it?