I am not sure why installs are treated as a negative. Thank God Sony put a hard drive into the PS3. If the 360 had a hard drive, you would "have" to install games also. As it stands now, multi-plat developers need to work around this limitation on the 360. I think you are seeing some problems with aggressive caching on the 360 causing the chronic freezing issues on that platform. Again, a 1 time install and cut scenes = no problem.
Thanks for the input, Jeff.