Yup. The thing that got me thinking IR might be too low-res to use as freely as the "color" channels, is that on the IR birding page I linked to, all the standalone IR imaging devices are super low-res. 1) 208x156 @ $250, 2) 80x60 @ $350, and 3) 384x288 @ $1600
Part of the price on the "high-res" one is going to be because it IS a very niche item, but if resolution was as cheap for IR as it is normal sensors, why wouldn't any of these companies had made higher-res devices? I'm thinking that adding IR pixels isn't as easy as RGB pixels. Canon has likely added just enough to help.