The Ganzfeld experiments were riddled with statistical errors as well as problems in replicating the results.
It's an intriguing experiment, but until it can be replicated over and over it still doesn't mean much.
Meanwhile you've brought up an interesting subject - what is and isn't scientifically plausible in current tv SF, and where are people willing to suspend disbelief?
Which i hope is one that people will explore. This whole thread is meant to spark discussion on all of these types of issues in science fiction.