I would have to agree with Jewels, after 9 seasons of ghost hunters and every episode is nearly the same. (though I am bloody addicted to the show and won't stop watching it.) A noise is heard and the usual "Did you hear that?" followed by " I don't know what was that?" And a bit too much talking when they should have their recorders going.
The other thing is, with the new technology with mini cameras, wouldn't it make sense for each member of the teams be fitted with a camera on their head. so that when they see a shadow or something, the camera also sees what they see.
Also, these investigators should run the audio through a speech recognition software, this way they have a text of what is said in the EVP's.
Other then that, I think that the research in the field of paranormal is going well.