Just because Duke has only played one ranked team doesn't mean they don't deserve to be ranked #3 or 4. I could see you arguing whether or not they deserve to be ranked ahead of Stanford, but not the argument you made.
The ended the season last year at #6, lost only Selby and Sheer to graduation, and added Jones, Moore, and Heckmen (freshmen), and got back Henson (injury) and Wells (suspension). Both Alexis Jones and Amber Henson were top 10 kids in their respective classes, altho I don't see any stats on Henson so maybe she's injured again? Triad or Cam can tell me if I got any of the aforementioned facts wrong...
Frankly, I'd have put them preseason ahead of Stanford behind only UCONN and Baylor. On top of that, after Baylor's loss to Stanford, I'd have ranked them UCONN, Duke, Stanford, and Baylor in that order. Duke is loaded and deep. I don't disagree that the "jury" is still out on how good they will be this year, but I honestly think they are almost as much a lock for the final 4 as UCONN and Baylor...
BTW they did beat #10 Cal by a similar margin to UCONN's victories over PSU and Maryland. And say what you will, UCONN didn't look overly impressive vs. those 2 teams. The beat down vs. Stanford, however, was another story...
I'm not saying their schedule has been hard - it's actually a very easy schedule the entire year for them, but Cal was a good measuring stick... and the game vs. UCONN will tell everyone a lot...