Here is a bit more background in terms of the attacks Shawyer has endured:

The EmDrive Effect is Confirmed by Current Experimental Evidence

Now that smug scientists are forced to abandon their ad-hominem attacks based on Shawyer’s lack of peer reviewed articles, they are complaining that the last experimental confirmation of the EmDrive effect, by Martin Tajmar at Dresden University, is not yet peer reviewed. When Tajmar’s work will appear in a peer reviewed journal, they will think of something else to say – smugness is not easily defeated.

Some critics say that Tajmar’s results don’t “confirm” the EmDrive. In some cases, their “arguments” don’t seem very scientific. “My insight is that the EMDrive is complete crap and a waste of time,” CalTech physicist Sean Carroll told io9. “Right there in the abstract this paper says, ‘Our test campaign can not confirm or refute the claims of the EMDrive’, so I’m not sure what the news is. I’m going to spend my time thinking about ideas that don’t violate conservation of momentum.”

Well Shaw’s study is now published in a large peer reviewed journal and covered on the NASA Spaceflight site and we hope he succeeds!

thanks to hacked.com for the great info