Ok. I'm going to play the devils advocate on this one. Look at arranged marriages - no, I'm not saying they are the epitome of healthy relationships. Hell no.
But what I am saying is that people who come from societies where arranged marriages are the norm have little experience with the opposite sex because it is considered socially unacceptable. And on the other extreme is western society where we do what we want, when we want, with whom we want until all of a sudden something happens (the stars align, God says "here you go" or we hit 35 and realize we're still single) and BAM! we get married.
Dating is great. It's fun. You learn about yourself and others. But I also think we put more and more unrealistic expectations on other people the longer we date. That the perfect mate has "x, y and z" characteristics and all other folks who don't have those characteristics are not right for us. That finding our "perfect match" guarantees a relationship. In the west, we find characteristics to love - then meet somebody who matches that (or comes as close as we can find) and marry that individual. In the east, girl is paired with boy who already comes pre-configured with certain good and not-so-good characteristics and they find a way to LOVE EACH OTHER.
There's value in both approaches - the eastern "make it work" approach and the western "let me find someone I like" approach.
So to answer you question - i think "dating" experience is worthless. I think LIFE experience is what is important. Sheltered serial daters?? Momma's boys who've played the field?? No thanks. Give me the dude that's had one or 2 serious relationships but has been places and seen things - he's had enough life experience to know that things never work out as you planned (sometimes better, sometimes worse), that love and relationships aren't just emotional (finishing each other sentences) but are also financial, spiritual and sexual, that rainy days do come NO MATTER WHAT YOU SAY OR DO and being prepared is the only way to lessen the effects...
...and that when it comes to diamonds, the bigger the better. .