An unsubstantiated arbitrary metric pulled out of someone's ass. Push as best you can, ask an occasional question and under your educated and experienced breath tell (x) to screw themselves. It's just not that critical.
There is friction between the two TL's mentioned. Work with yours, ask questions. What's your work history? Gender? Age? They will never be satisfied, do your best. They sound like inexperienced assholes.
We had some at my store. I include myself. I could run fucking circles around 90% of the young assholes (only a few) most were decent kids and fairly good workers. Since we didn't have blue hair, nose rings and weren't covered with tats we suffered. Personally I think the tat thing is...