I'd quantify hundreds of hours as huge amounts of time, which is what most the people with high grimoire have. Besides.. I left the game for two big periods because it was boring, from Oct 14 - July 15 & Oct 15 - Jan 16... and the time was equally split between two accounts when I was playing the game. But yeah, I haven't met a single player yet that has a high grimoire on Destiny & is solid at other games/genres.. & when I say other games, No Call of Nooby doesn't count... it's basically the same sh*t.