I don't think 3 years is quite the normal. Where i am at, 4 to 5 years in the norm. Your CEP is likely 1 or 2 grade above ur current grade. If u get to 11 from 12 in 3 years, they might be looking also at your years of experience. If u are a fresh grad who enters at 13 and promoted to 11 in 3 years, this is highly unlikely even for scholars.

Don't harbour unrealitic thoughts, work well and u will be rewarded, maybe not soon enough but eventually you get there. Most importantly, this is at least a stable job for most . You won't strike it rich but you wouldn't starve either.