This page:

http://addressof.com/blog/articles/CodingGuidelines.aspx

says that using long declaration is not good. Basically, they quoted this:

Do use the short method for instantiating classes on the same line.

Right: 

Dim someStuff As New Collection()

Wrong: 

Dim someStuff As Collection = New Collection()

Can someone explain me why it is wrong to use the long declaration?