Quick, Stupid Xbox 360 Question

[4ObliVioN4]

I've heard from several people (but no one knowledgeable really, just friends and stuff) that standing the 360 on its side as opposed to laying it down causes more problems and the 360 will scratch discs much more often. I looked on the XBox website but couldn't find anything that talked about it. Just wondering if any of you guys know if what I've heard is true. Thanks.