It sounds like they've done some research to back up their 5 second logic.
I had my own method of "undo" that I've been using - I simply put GMail in offline mode when I am batch replying to emails. Then before I send, I do a quick glance at my outbox. If everything looks good, I go back into online mode
Before this I was just saving as drafts, but that seemed a little messy.
I do wish this was configurable though. It would be nice if I could set it to perhaps 10 minutes with some sort of override (e.g., I am on the phone or chatting with someone right now and I am trying to send them directions or something). Most of my emails are not that time sensitive anyway.
I had my own method of "undo" that I've been using - I simply put GMail in offline mode when I am batch replying to emails. Then before I send, I do a quick glance at my outbox. If everything looks good, I go back into online mode
Before this I was just saving as drafts, but that seemed a little messy.
I do wish this was configurable though. It would be nice if I could set it to perhaps 10 minutes with some sort of override (e.g., I am on the phone or chatting with someone right now and I am trying to send them directions or something). Most of my emails are not that time sensitive anyway.