I disagree on the channel width. Yes, a packet uses double the bandwidth, thus double the chance of collision. But also half the time so half the chance of coll

I disagree on the channel width. Yes, a packet uses double the bandwidth, thus double the chance of collision. But also half the time so half the chance of collision. And you can get more channels than 3, if you use 20Mhz channels, not the 22MHz channels by simply not using 802.11b. only use g&n and you get four channels. And do use the DFS channels, exactly because people like this author are not there to congest the channel. Just make sure you have non-DFS too while the DFS AP is in listen mode. So this article is very much not written by an expert.