GoG could easily add DRM-free preloading, the only thing they'd have to do is split the archive file to Data and Executables. That would allow them to let you download all the Data ahead of time which usually accounts for 90-95% of the download, then the smaller Executables/DLL pack along with the installer could be downloaded separately later. But I understand the developer's paranoia about leaks, so I really wouldn't mind them encrypting the "preloads". They can always reissue the installer later after the first patch for a DRM-Free installer. But as someone else posted preloads most likely won't happen till their Galaxy platform is done.