Clock Skew on PCs: Investigating Today's Accuracy

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alxm
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Anyone know what a typical clock skew would be on your average PC these days?

Updating my clock with NTP it appears my laptop (when running 24h and not in idle mode) drifts about 2 seconds a day. I get the impression that's a lot. (John Harrison was building better mechanical clocks 250 years ago!)
 
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1-2 second a day is about normal.
That's about 10ppm for the clock crystal working over a wide range of temperatures, how much extra would you pay for a PC with a better regulated HW clock when you can sync to 20-30ms for free on the net/