Assuming they work full time, that is pretty average. The old "30%" rule is that you should spend no more than 30% of your pre-tax wages on rent. Your friend is spending just over a quarter post-taxes.
I imagine they're in a high cost of living area, where tons of other people want to live. If that's the case, it probably shouldn't be any surprise that in a supply restricted market, the prices are also very high.
*edit: they're not in a _high_ cost living area, but it's not cheap either.