I really think it depends on the readers' preferences, not on the type of ad that is run.
I'm learning a lot from you guys about nonfiction sales here. Apparently they sell more. Certainly, textbooks and the like haven't entered the ebook craze.
Thanks for sharing Lily. All my books are fantasy,sci fi romance and I don't sell 30 paperbacks/70 ebooks like some people. More like <5/95.
edit: btw, for more hard data, at the moment I sell all my paperbacks at $12.99. On Ingram I set 45%. If any of you believe I'm overpriced, or under, with my books, I welcome advice. My ebooks do fine at $3.99, so I hesitate to drop much further with pricing paperbacks. Not to mention, the royalty starts getting pretty abysmal at lower rates--currently, my royalty back is only around $2-3 for paperbacks, similar to the ebooks.