Just FYI, that last statement about iOS devices is wrong, at least in general. Many third-party browsers exist that allow downloading. In addition, there are third-party apps that allow downloading in Safari.
This only applies to non-iOS format files, however -- PDFs and other formats that have native iOS apps can be downloaded directly in Safari. PDFs open in iBooks, for example.
So it's not true to say that iOS devices can't download from the web.