It is a little bit more complicated than that. Transferring out of EDTX has been easier since the Fed Cir granted mandamus in In re TS Tech and its progeny (which was based on a 5th Cir decision, In re Volkswagen). The case law is still developing, but patent trolls are having a slightly more difficult time staying in EDTX. http://patently-useless.tumblr.com/