Any web designer who is worried that "regular Joe Sixpack can now go and create a decent looking webpage" which looks or functions better than something they would be willing to accept payment for, should probably not be trying to make it as a professional designer.
CSS extermists will tell you how using those frameworks is evil, lame, etc. I think the problem is that web developers feel threatened of loosing their jobs (gigs), since regular Joe Sixpack can now go and create a decent looking website in XHTML/CSS with minimal effort.