More data points, if anyone is interested:

 ----- cynic.portal.ca ----- PPro 166 on Asus Motherboard (old NetBSD-current)
offset:               -0.000861 s
frequency:            4.689 ppm
poll adjust:          28
watchdog timer:       40 s
 ----- amon.portal.ca ----- P133 on Asus P55T2P4 (NetBSD 1.2)
offset:               0.001509 s
frequency:            44.231 ppm
poll adjust:          18
watchdog timer:       90 s
 ----- academic.cynic.net ----- 21066 Alpha on AXPpci33 (NetBSD-current)
offset:               1.014795 s
frequency:            12.310 ppm
poll adjust:          -30
watchdog timer:       37 s
 ----- gnostic.cynic.net ----- Sparcstation IPX (sun4c) (NetBSD-current)
offset:               0.003434 s
frequency:            11.983 ppm
poll adjust:          0
watchdog timer:       18 s

cjs

Curt Sampson    cjs@portal.ca	   Info at http://www.portal.ca/
Internet Portal Services, Inc.	   Through infinite myst, software reverberates
Vancouver, BC  (604) 257-9400	   In code possess'd of invisible folly.