Jon,

Thanks for the interesting perspective. I've actually opened, run, and sold a retail store before (mobile phones and accessories) so, while the type of layout logic I referred to in my comment above did not apply to my store (because it wasn't large enough) I did read ALOT on the subject and was part of the local Chamber of Commerce so I can assure you that impulse buying considerations are a big part of why stores get laid out the way they do.

There are even consulting firms that make a tidy income by advising stores on product placements within the store for maximum sales.