it means that they had more time to develop as artist than cole, thus the reason why they have some type of leverage over cole. Wiz was first signed in 2007 to warner bros. he had time to find his niche and see wat worked for him and what didn't. he found the weed gimmick and now he's blown up. Big sean has also been signed since 2007 and got time to cultivate his fanbase threw mixtapes and shows. Cole's been signed since 2009 (2years) and he's just gettin warmed up (no pun intended)
My point is that wiz and sean had more time than cole to develop, thus is the reason why they are more successful at the minute.