Guys who take very simple applications and succesfully move them to .NET and taking that as a measure that every VFP application can be succesfully moved to .NET is misleading. I'll give you a response later, as I've spent more time on the topic than I care to.
But I will say this...these types of presumptuous statements are at the root of the issue - in this case, the belief that the converted apps were 'simple'. I'll ask that you qualify...what 'guys', what 'apps', and why specifically do you consider them 'simple'?
Kevin