You asked about the ColorMunki, but just to add-in, not all spectros do the same. The i1Pro2, for example, reads 200 samples per second and averages them. So how many readings are registered and averaged for each patch depends on the speed at which you pass a spectro over the row of patches on the target. The target I use most often (X-Rite 2371 patches on 4 pages) has 29 patches per row. If I'm not paying too much attention to the speed I'm working at, I may read such a row over a period of roughly 8 seconds. Therefore each patch is getting 0.276 seconds of read time, resulting in 55 samples per patch (0.276 seconds x 200 patches per second). Judging from the profile quality I'm achieving, this seems to be fine.