To me, this is a "formation flight". If both are "sorta middle of the road", normal may be fine.
Something different (time of glider pilot, turbulence, heavy weight), thou shalt communicate what you want and/or can do!
It behooves BOTH pilots!

Loading a glider to 10-11lbs when the site is used to 6lbs, something needs to change!

Just my take.

I fly rather light wing loading gliders (1-26 SN 002, I weigh about 150lbs) to wet 15M glass full of water (9+lbs) and communicate to the towpilot.
You're BOTH PIC in your craft!
You do right by you!

Say, high altitude density for the tug and a heavy glider.
Glider pilot wants "X" but tug pilot states "no way", wait for another tug, or drop weight.
Don't assume!

We have enough statistics, no need for more, especially if they are avoidable.