as a hns tech for years, id strongly disagree with you guys based on comparison of the two systems only. with hns systems, if you DONT ground you WILL have problems guaranteed. i know we had a debate over this last year...so here we go again. your transmitter just through the natural process of working, will create static. if that static has nowhere to escape (a proper ground), it WILL cause problems, whether it be shorting out the transmitter, modem, or the line itself. its just a matter of time and usage as to when the "problem" of no ground becomes an issue. i still come across installs from newbies who dont think grounding is important, and guess what, a blown transmitter needs to be replaced. so in my opinion, NOT KNOWING ANYTHING TO IMPORTANT ABOUT WB, i would have to say that, yes, grounding will make a difference.