FranticFish - 5:13 pm on Dec 1, 2011 (gmt 0)
When searching for a dermatologist that opens on Sunday, which would you you'd rather have as second choice:
A, a dermatologist open Monday to Saturday, or
B, a hairdresser, clothes shop or restaurant open Sunday.
I think it's far more likely to be A. And so do Google, otherwise the AdWords would show B too.