I didn't read through all the papers, but didn't the testing labs measure the weight of the apparatus precisely before and after? If it's any mass being vented off, I assume this would show up, and you can make precise predictions about how much mass would be needed by calculating upper limits for the velocities these particles could be accelerated to.

So your counter argument should be pretty easy to test, and I'd be surprised if this isn't accounted for in these experiments.

In the example of FTL neutrinos there was only one non repeatable instance - here we have at least three.

Most of the times skepticism is good, but sometimes it can blind you - at the very least this effect needs to be investigated further because the implications - if it turns out correct - to both practical applications and physical theory - could be huge.