Long answer: Dallas has a lot of investment money, however most of that investment money goes towards cash flow businesses like commercial real estate, oil speculation, and banking. However, there has been a pretty sizable uptick in investment dollars willing to put towards tech companies within the last 4-5 years. It's relatively straightforward to find capital in Dallas, but it's insanely hard to find capital willing to stomach high burn early stage tech companies.
It's ok, and slowly growing, but it is very hard to raise money. There are groups trying to advocate for more startups but they just can't raise the capital. One such group is http://launchdfw.com/jobs/. SoftLayer was probably the biggest exit Dallas has seen. The money is just tied up in other industries and it won't be risked on high tech startups. The lack of capital being raised results in the lack of start up jobs in Dallas. When I was looking for a new job back in August, I think there was maybe 6 postings - one being my current company.
We are just a very IT / Enterprise heavy area. People are more likely to find a job at Match.com or AT&T.
I live in Dallas, it's a great place to be right now. Growth is crazy and the opportunities are endless. Also, being in the central part of the country, doing business on both coast and in Europe is so much better..no 4 am meetings.