It seems that the Boston Globe is spreading inaccurate info on MIMO (multiple input/output) technology. This from the Boston Globe:

Another caution: avoid MIMO routers. These Multi Input, Multi Output gadgets achieve excellent signal quality and range by hogging the wireless spectrum up to 219 yards away. If you live in the city or suburbs, your MIMO router will knock out your wireless-enabled
neighbors’ connections.

And if your neighbors also have MIMO, you’ll all lose your connections. MIMO also won’t work with those free Wi-Fi hotspots that are popping up in increasing numbers of cafes and libraries.

And this is the reply from Glenn Fleishman, blogger at Wi-Fi Net News:

“Less Is More” (Apr. 9, 2005) contains a glaring error regarding multiple antenna wireless networking. The reporter says that MIMO (multiple not “multi” input/output) gateways hog spectrum and knock out neighbors’ reception. This is entirely untrue. MIMO gateways for Wi-Fi, unlike previous range-extending Wi-Fi, are more sensitive receivers not more powerful transmitters.

There’s more if you want all the technical details. It does seem that MIMO and/or 802.11n could become a source of coexistence and interference concerns, if not actual problems.