When I was hired at my LCC/Major, we were told 3-4 years. 5.5 years later we're still FOs. When we were hired, there were 2 yr CAs. The whole upgrade thing is just mental self-pleasuring (replaced m word). Upgrade times are X years for those hired X years ago. That may or may not be the case X years from now when a newhire today gets to that same seniority level.