SEO Question

[mcplants]

Of course SEO changes by the day, but these days for the sole purposed of SEO does it matter whether you register cookingschool.com or cooking-school.com?

Of course the difference being the hypen between the two words.

In the past I've felt that the URL seems to carry the least amount of weight in the big picture of SEO so does it make a difference today?

Thanks,
-Mike McGroarty