If we take into account how female friendship is portrayed in this game, I would say that Alison would go for it. Look at Lena's best friends: Ivy heavily flirts with Ian if she's interested, Louise goes for him fully obsessed just if he tells her he likes her style and the Twilight movies and slutty Holly goes all in the minute Ian and Lena's relationship is finished.
His high is average or maybe slighty below average for his age group but all around I would say Ian is above average. He's fitter than most people, finished college, has a job, doesn't live with his parents, his family seem to be well off and he is more intelligent and attractive than average.
It's just than unlike most other games, he's not the most attractive guy with the biggest dick in town. There's Axel which looks like the übermensch in a nazi's wet dreams and Jeremy and others with the BBC. Which I think makes the game more interesting whether you play it as a chad Ian, cuck Ian or anything in between.