I'll have to disagree with you. I'm hearing very good reports from my mates in Hyderabad. The movie has clicked with them and Vijay has clicked with the girls. I'm not sure about guys, they might need a masala/racy flick like like Thupakki for them to accept Vijay. But Vijay has clicked big time with family audiences. I think that should be more than enough for a first attempt. I'm sure he'll carve a niche for him in the near future.
P.S. My uncle and aunt in hyderabad love Vijay after watching this movie. They are like 'whoa, this boy is really cute' and I'm like 'lol, it's not a boy, he's almost 37'. (In their defense they don't watch tamil moviesso they have no idea about Vijay or his age :) )