Nice figures, thanks for that!

But now I'm wondering how many Linux users use apt-get and other methods rather
than regular download...

I am sure the % of Bitcoin users running Linux must be way higher than 10%.

Based on the download counts on the Armory downloads page on Github, the last release of Armory was about

   70% Windows
   30% Linux
   0%   Mac [not supported!]

However, the stats are a little fuzzy because many users will actually install Armory on two different computers (online and offline), and many users download two different versions, maybe 3 or 4 if they get the versions wrong.  I've been recommending using Ubuntu for the offline system, because it's very simple to setup a linux system that only runs one program, even if you're normally a windows user.  That may be skewing the results a bit in favor of Linux (actually, does it matter?  They are setting up Bitcoin software on a linux system, maybe they should count anyway...)

<marketing spin on>

Linux marketing share quadruples in less than 24 hours

Stunning increases in Linux market share in Bitcoin have been reported. In less than 24 hours it has increased from 7%, to 20%, up to an impressive 30%.

Total installs for Windows, Mac and Linux have increased from 97% (80 + 10 + 7) to a high estimate of 130% (80 + 20 + 30).

The volume control in the cult movie 'This is Spinal Tap' famously went up to eleven.

Now with Bitcoin it goes all the way up to an ear-melting thirteen.

<marketing spin off>

:-)