Yes rents have gone up but not as much as you think historically at least in the UCSD area. La Jolla/UTC last year took a massive hit when UCSD basically closed up in campus classes and the majority of the kids stayed at home to do their classes remotely.
My 2/2 on Gilman Dr, went from $2400 which was the avg rent in 2018/19 to $2150 just so it would get rented out. This year tenants moved out and it went for $2800 easily. Some were going for $2900 and probably got what they asked for. In reality though it’s only up maybe.. 3-4% per year which is avg for San Diego. This is only for utc/UCSD area.
With all that said, rent throughout is definitely going up and I assume thats due to the much higher selling prices homes are now commending. Got to make those up somehow..