Before I bought my 6UY, I was pre-occupied with that thought... After a week now of enjoying my new plasma, there's not a problem to be found...
I use several other remote controls and wireless controllers for a Playstation 2 and everything functions perfectly.
My local a/v retailer gave me that line that they'll totally disrupt my other components of my HT. It is just a line they use because store retailers usually can't get the commercial models.