I would say that 45 mins per night for our son in DGS in Y7 is a generous estimate, it often took him less time to complete it than that. Wily boys would get started in the LRC in break and at lunch.
Very rare to get two lots set at once in my recollection.
I am ambivalent about too much homework and I was very pleased that DGS eased them through secondary transition without piling it on.
I think 2 hours nightly is shocking for children aged 11 personally. I suspect that must be embroidered, surely?!
And before you ask, he is a very good student, has always done his homework and has never yet been given an after-school for not doing it