I was always under the impression that drift was very much based on the
quality of the clock chip, and that this was reasonably variable.

>From 10 different 5000/260's around here, I get these drifts:

	-16.447 ppm
	-14.347 ppm
	-12.498 ppm
	 -9.370 ppm
	 -8.156 ppm
	 -7.361 ppm
	 -4.622 ppm
	 -0.365 ppm
	  3.450 ppm
	  6.144 ppm

The -0.365 ppm drift is from our oldest one!  The only 5000/260 I've got
running NetBSD is +56.585 ppm.  I just assumed it had a bad crystal...

Simon.