We'd all rather have EV. That's not the question. The problem is price. SSL certificates are simply too expensive. Reduce the price and you will see an increase in adoption.
I have no idea about StartSSL, but some cheaper EV providers Comodo immediately ask you to use a lawyer or CPA to write professional opinion letters.
This allows the CA to do less work according to the EV guidelines, but massively slows down the validation process and may incur additional fees unless you have an in-house legal team or CPA.
Still waiting for a cert request they flagged "for check within 2-3 hours" two weeks ago…
We're also doing some future work to make EV more affordable. I'll have more to announce in the next month.
In the meantime, EV works out to be around $20 a month, which is not significantly different to what you pay for GitHub Enterprise or Trello.