PW Daily has a fun little tidbit on the Potter5 phenomenon:

And a PW book reviewer in the Washington, D.C. area noted that a friend of hers got a surprise when she took the book to a doctor's appointment earlier this week. "My friend told me yesterday that she took it along to a gynecologist appointment," PW's reviewer said, "and that when she arrived in the waiting room, all the other women there were reading the book too and chatting about it." "When she finally got into the office, the first words out of the doctor's mouth were, 'So, how far along are you?' Since my friend is in her late 40s and a longtime single, this was a startling question, until she realized he meant 'with the book.' "