Agree with others who say that men don't necessarily recover more quickly, they just deal with it in different ways.
Marriage suits men, who are 'looked after' more then women, who tend to do the looking after. Women are well able to be self-sufficient after the loss of their partner - the obvious exception to this being 'surrended wife' types, who have left all the decision-making to their husbands, and can't properly function in an adult world.
My Mum died 11 years ago, and luckily my Dad is a very capable man, and was able to live alone and look after himself and the house perfectly well, while working full time. Fortunately he has a big group of local friends and family for emotional support.
I do think in the immediate aftermath, widowers tend to continue to be 'taken care of' by all their women friends and family - Dad had cooked meals dropped round to him, and was continually invited out for dinner. Widows I know tend not to experience this as much, as it is assumed (usually quite rightly) that they're perfectly capable.
I think my Dad did most of his grieving in the years leading up to Mum's death. By the time it eventually came about, it was mostly a relief (and he has since completed the necessary paperwork to request that his life not be prolonged in the event of similar circumstances).
He met someone about 6 years after my Mum's death and embarked on a friendship which I suspect has become more, but they have no intention of moving in together, and he continues to look after himself domestically.