This is quite creditable for Atlanta. But I wouldn't say "Move over, SF". This includes all businesses, from new ice cream shops to new biotech companies. SF probably still leads if you look at tech startups.
They are showing 158 right now.
I think Seattle, with their rich ecosystem of Microsoft-centric startups easily beats SV/SF as far as technology startups are concerned. Austin/Dallas duo is also tech-heavy, as well as Boston area.
Internet-media is only a niche and "technology" isn't just an alias to "web site", it actually has its own meaning.
You're right that the bay area startups that you /hear/ about are largely media-oriented, but that's just confirmation bias. There are just tons of other startups and small companies that you don't hear about. In Seattle, people still look at you a little funny if you work at a startup (why wouldn't you just work at Microsoft or Amazon?)