No, this is just a common misconception. If you look at the history of rulings from east Texas, you will see they invalidate a higher percentage of patents than other courts in the US. East Texas just implemented rules on length of filings and length of arguments to cut out most of the crap out of patent cases, making the process cheaper and faster for both sides.
So, if you have an iffy patent, and you want to have the best odds of winning, don't file in east Texas. But expect to pay a lot more.
I guess the east Texas model is bad for lawyers who file thousands of pages of "supporting material", and then get paid $200/hr to read it. But how much of this supporting material was actually relevant? Not much, which is why the judge in east Texas was able to enforce page limits.
The east Texas model is the right way to rule on patent cases. But the patent system needs to be supported by better laws.