I think you did a pretty good job at doing so. I remember a small number of places where you mention how Perl derives feature X from Unix, and I don't think I can remember any spots beyond the first section or two where any C-like references are made.
I haven't picked up Learning Perl for Win32 Systems (so I have to ask this in ignorance), but why the need for two books? I think your Learning Perl book serves equally well on both platforms. Is it for people who cannot think outside of the Windows box, or are there other aspects to the book to make it easier for people who only use Windows?
MrCromeDome