EV certificates are no different from normal SSL certs. They offer no extra security. References:

[1]: http://security.stackexchange.com/a/15871

[2]: https://www.blackhat.com/presentations/bh-usa-09/SOTIROV/BHU...

There is an interesting HN discussion on the topic at https://news.ycombinator.com/item?id=8344238