I mean that they are not actually Visual Basic. The last version of Visual Basic was v6.
VB.NET (and VB 2005, which is just the most recent version of VB.NET) is a completely new, different language which was saddled with strong syntactic similarities to Visual Basic in the optimistic hope that VB programmers woud be fooled into thinking it was actually VB. Which it isn't.
That's not to say it isn't a good language. It is. It just isn't VB.