For new users, these 40 minutes are the 40 minutes of death. That is an exaggerated nickname, but I adapted it from "BSOD". 40 minutes of hell could also be their name.
It would be useful, if the 40-minute-error also indicated the number of remaining minutes.
I hope my feature suggestion to be considered.
Unable to add tag: post-limit.
Why have you not posted this on the main page of meta.stackexchange.com? Because my account is disabled in that stack.
Why don't you wait 7 days then? Because the vast majority of their moderators are paranoid amongst false positives against new users. I was even accused for being a troll. Would you shout at a baby for being unable to stand on two feet? Even the policy itself of StackExchange states: "Have an open mind.". http://en.wikipedia.org/wiki/WP:AGF