Seems like the lesson should be "Update Intel regularly and be ready to change plans in accordance with new information"

I'm so far past the "don't make assumptions about people" thing now. Sorry, but I'm going to assume that just about everyone is a mouth breathing retard who only got whatever job they have through nepotism until they prove me otherwise. Even then, it's more likely that someone is a sperg with one or two specific talents than anyone actually worth interacting with.