It seems that IntelliAdmin and digg are embroiled in a lengthy Broohaha over the prefetch folder. This is a long standing argument that is based on an misunderstanding of what is being achieved.
IntelliAdmin is pointing out that in order to increase Startup performance, delete the contents of the prefetch folder.
Digg is saying that applications will then start slower.
Both are right.
But then we have a post here, and here, with a response here, and more from IntelliAdmin here
Phew, It's getting personal.