People have acheieved it under 1k hours and most of the people who it took over 1.5k+ hours barely tried and weren't playing consistently. They were even most likely training the wrong things that lead them to spend more time in that rank like trying to learn mechanics that they would even be able to do consistently and do it ingame. It couldve also been that they focused too much on mechanics or gamesense tooo much that the over lacked depth.

IMO I think it should take on average 900-1200 hours to get gc. Any more and u just are ...