I agree it seems that Americans are attempting to make Chinese software vendors seem evil or that they are spying on us. As if the NSA wasn't watching us. I mean in the grand scheme of things it doesn't matter, everyone is spying on you get over it lol.
Qihoo's anti-virus has over 1 billion users. Compared to that no one can compete, we have Avast who is trying to catch up but their products suck. After version 7.0 I have had no interest in their products because they have become bloated, and the user interface is poor. Their protection scores are not that great either, and they slow down system performance.
However, as you said people are still following them. The biggest issue that these Chinese technology companies are going to have in America is to get over the preconceived idea that if it's from China its bad. Meaning that they have 2 options.
Hire someone who has godlike PR skills lol. OR Dissociate the fact that they are a Chinese company.