I agree with Scott.....
We are very fortunate to have the participation of several manufacturers in these chat groups.......usually, the information they furnish is good, valuable and cutting edge...........if you want to believe what they say, fine....if you don't, that's fine too.......over time, it will be pretty apparent who's words you can trust and whose you can't. What do we gain by confronting a manufacturer or its rep with tests that somehow show his/her product to be less than someone else's ??
IMHO, we gain nothing, and in addition we risk losing thier participation and cooperation in answering our questions............and if we lose them, we have managed to decrease the value of this list to us all. Make your own evaluations of input from the manufacturers.........but let's not antagonize them into leaving.

Jim