Earlier quoted context omitted.
> It is a very simple, script language that allows creating dynamic GUIs on the fly. Very limited ones. And ones clients will have a shock when seeing. And still coding it all together. With Delphi you can drag and drop great looking (and more full featured) prototypes in zero time. It will be limited to Windows, though, I'll give you that.
Clients having a shock after seeing a prototype says a lot about the author and very little about the language the code was written in. Can you clarify "coding it all together" part. I have no idea what you meant.
Of course for more than trivial built-in behaviours you'll be writing code, but for a UI prototype, especially if it's just CRUD forms etc., you can get it built in a few minutes with no code. Drop a database connection component and set the connection properties, and you'll get live data and properly typed and bound controls on the form too.
Compilation takes fractions of a second, so that's not an impediment to design iteration - but you don't need to compile or run to see what it looks like since it's effectively a WYSIWYG form designer.