I think the Star Wars certainly earned it's place in pop culture. You see "Darth Vader" and "May the force be with you" pop up in numerous places in the years between trilogies.
But I think release of "Episode 1" was where things went from being "Yeah man I like Star Wars" to full nerdiness that rivals the most hardcore of Trekkies. The whining/griping/justification of its greatness *after* the movie came out only served to make the fans look even worse.
And yes I've seen "Episode 1". It is a very middle of the road sci-fi movie that gets unjustified love because the name "Star Wars" is on it. But Natalie Portman was a total babe in the movie.

