No worries! The new number makes much more sense. Since I've seen elsewhere that drivers seem to make up a pretty big portion of the tree, it makes sense that the center of gravity for change-rate would land near there too.
I guess I wasn't too far off (in orders of magnitude) on the number of unaccounted-for lines in the data, although I did undercall it by a factor of 4.
Man, the kernel's gotten huge! I actually tried to download the latest kernel and untar it in a 300MB partition, and it b0rked out, filling the disk only part-way into the "drivers/" directory. Next time I'll do it on a machine with a more generous disk space allotment. :-)