I'd have to agree.. No news is good news. If you'd failed it, they'd call pretty quick (within a day or two) and make you go in for the three hour..
For some doctors it may take about 3 days or so. Most docs wont' call you with the results unless they results were high and they want you to come back for the 3 hr test. You can always call you docs office and ask for the results.
If you pass, you may not get the results until your next appt.
I think I got a call the day after because I failed it. My ob does not call if you pass.
It seems like you should have had them almost immediately. Certainly by now or tomorrow, even given that a weekend was involved.