The Origin of Windows, by the product manager who shipped Windows 1.0 (2010)
technologizer.com
technologizer.com
"At $50 for the Borland product vs. the Microsoft $400 compiler, it was a bit like comparing a VW to a Porsche. But while Turbo Pascal was lighter weight for serious development, it was almost as quick for programming and debugging as Microsoft’s BASIC interpreters."
Found this article where the guy claims that the technology was folded into Delphi and it was probably about 1 million lines per minute on much faster hardware:
"By November, we had finished testing and come up with a solid release."
Windows was announced in November of 1983.
I guess what I am saying is that for Windows 1.0, this guy was most likely not that instrumental.
He is very clear in his role and influence on the initial versions of windows, since you don't like reading I'll sum it up for you,
"There wasn’t much time to make changes."