First of all, that is a really cool new acquittance, I would just thank them, give them a few brews, invite them to dinner, and ask them if they have an estimate on the AAU's.
Second, Depending on how much I have had to drink I'll call out anyone on anything that I am 100% certain I know nothing about. I'm sure I'll learn something from it!

I will also agree that even using "lab tested" hops it is still a best guess for the IBU's, the more I have read about it, it starts to look like the "MPG for SUV's". Reality just does not seem to match with what your told. Since this shortage of hops, I have been using every variety of substitution I can think of. Some have been pleasant surprises, some have not been that great.
You live and learn, or at least you stay alive day to day, or not. Take your choice.
I am absolutely certain I am me, but even then I'm sure someone will argue about that, and depending on my mood I might agree.