This his has been my experience, too. My bike came stock with a 143mm wide saddle, and I would have tightness in my hamstrings when I was positioned towards the rear of the saddle such that my sit bones were properly supported. I just moved to an arione last week (132mm), which seems to be a much better fit.

It may be worth while to measure your sit bones to verify if your current saddle is relatively too wide.