Nerd outfit bugged?

Everyone keeps talking this armor up, but I haven't managed to gain a single double point out of it yet in some 50-100 skill books. I'm using T2, so 10% chance apparently. Starting to feel like a chump swapping the armor out and checking my skill points before and after every single time.

What does it look like when you get a double point anyway, does it notify you so you don't have to check to see if it procced?