From another HN discussion a while back: "entry level", as in starting position at a company is not the same as "entry level" as in first job ever. Yes, the article mentions recent grads, but I bet most of those who end up hired already have industry experience (through internships or otherwise).
Ehhh, high california taxes and high cost of living in SV make that 90k fairly equivalent to the $60k-$70k grads start out with in atlanta.