The VB team has released some compelling performance numbers for Visual Basic 2008.  A few dramatic ones:

 

VB 2005 (ms)

VB 2008 (ms)

Build a large multi-project solution (explicit build operation)

1,618,605

57,543

Responsiveness after opening a project

255,551

38,769

Responsiveness after adding a member to a class

327

36

Invoke Intellisense to see a list of types (first time)

1,192

530

Lots more data and some links at the VB team blog.