i dont agree with you..
it took 2ne1 around 3-4 years also to debut .. atleast from 2007 - 2009.
its 2012 -2015/16 for these groups..
but the key difference in YG is they might well be the girl group who might last a long time.. i am thinking 10+ years since debut. YG doesnt debut groups that often. and its better to prepare now as they will be under heavy scrutiny when they debut.
things have changed a lot from 2006 -2009 when bigbang and 2ne1 .. where they could debut with flaws and learn and get better through their career. but in the current environment they will be eaten alive by critics and haters who are looking for the slightest flaws to drag everyone down..
i hope they debut this year or early 2016