It's pretty clear from the numbers that Greg's contributions are counted for Novell/SUSE, but that also seems correct, given that he did most of those changes while he was still there.
Same thing for Kumar: while he is now at TI, all his patches that made it into 3.3 are still for Freescale.
Unfortunately, Linaro does not show up in the list, presumably because the assignees are mostly accounted to their employers. According to my count, there are 218 non-merge changesets from Linaro in 3.3, which would put us in front of Samsung (counting everyone who posts from @linaro.org, plus myself from arndb.de, and I'm probably missing a few more). I'm sure it would mean a lot to our beancounters if that could be fixed in the next statistics.
I would personally like to see merge changesets included in the stats as well, mostly because it I consider merging just as important as doing the patches to start with, but also because it would put me in the list. ;-)