You're kidding right? Hostx64\x64 is like 51MB, lib\x64 is 428MB, together they compress to like 116MB. And then you forgot the ATLMFC x64 files which are 465MB and bring it to 230MB compressed.
Edit: I feel like this whole discussion highlights the issues with the vs installer though. If it wouldn't create hundreds of folders all over the place it would be much easier to have a sane discussion about it.