Sort of.
Kind of like The Gay -- still plenty of strong opposition, no longer a dealbreaker, but still not really completely accepted by most of society. And our peer groups are probably a lot more accepting of it than the aggregate of mainstream American society.
The demographics that are in favor of legalizing weed and legalizing gay marriage are pretty similar. The breakdown by age and religious affiliation should be strikingly similar to gay marriage. There are differences in other demographics such as men being more in favor of marijuana and women being more in favor of gay marriage. Education levels won't be as predictive of the vote as with gay marriage. Racially it looks like Latinos are most in favor of legalizing weed with whites being about average and blacks opposing it (based on an exit poll in NV which very well could be wrong). If this is the case it bodes well for any legalization initiatives in CA. I think the most crucial demographic to win for both sides will be unmarried women.