I was shopping for a deal on 8x Fuji at Best Buy in Miami, and listened in on a Q & A session between a REAL joe public newbie and the Best Buy salesperson.
It was the blind leading the blind.
First question asked: which one is for burning movies? (He was looking at CD-R's). The salesperson got that one right, pointing to the Verbatim "movie real" packaging of a DVD-R 5 pack.
Then the customer wanted to know the difference between "R" and "RW" media. Here the salesperson wasn't on the ball, answering with a shrug saying it was just a different standard.
Then, "Why is this one so much more expensive", as he picked up a 3 pack of DVD-RAM. Here the salesperson correctly cautioned him it probably wasn't for his drive, but wasn't able to determine what drive the customer owned.
No one ever got around to discussing the difference between "+" and "-" media - many never really notice it IMO.
After another minute or two alone, after the salesperson was called away on another customer's question, the customer was about to leave with a pack of CD-R, primarily because of the price.
I couldn't help myself; I jumped in with a few suggestions, including the URL to this site.