It seems to me that there is an article like this for every city in America and abroad these days. Is Pittsburg really that hot ? The numbers I could find for 2015 was that Pittsburg attracted $437mn in VC dollars, while the Bay Area attracted somewhere around $27bn.
http://www.post-gazette.com/business/tech-news/2015/03/19/Ve...
That is a 50x difference.