Honestly, this affect(ed) me too much, and Gaf/Era was a huge reason for it, not marketing.
The hype culture and official threads were just too much to ignore. I felt like if I don't play the game at launch, I'd be missing out on the discussions. That has some truth as you'll probably have less people talking about the game if you play it way later, but now I think about it, it's not really that bad. Not being able to participate in the honeymoon phase of a brand new game experience is not a huge loss for me. I can still enjoy playing games later as long as I'm not spoiled.