GrimCo
Hero
Best character I ever had, in terms of fun-entertainment-durability, was in 3e; a Wizard (Illusionist) who started with* 15-12-12-11-10-7 - the 7 went straight into Wisdom and I played her as a happy-go-lucky airhead. Meanwhile others - some of whom had started with stat lines like your friend's - slowly fell by the wayside until, for a while, I was the longest-serving member of the party.
* - I think. I'm 100% confident on the 15, the 7, and that the aggregate bonus of the 6 stats was +2 or less.
Depends on campaign style. For story focused, character driven, role play heavy campaign, sure. Not big deal. Even fun. But for combat heavy diablo-like hack and slash (and thats what we played most of the time ), that power disparity is tangeable. It also limits what character concepts are viable. My experience is oposite of yours. Low stat characters would die rather quick unless you luck out and survive first couple of levels and get magic items to mitigate stat penalties. -2 on wisdom sawing throw hurts ( in reference to your 7 wis wizard). Cha was mostly dump stat for my group unless someone ( usually me) played Bard.