I did look at 1953 before I asked about how you can tell, and like you said, there was no mention of DRM on the 1953 page. After your last post I went back and looked at some others, and I did find some that said "other DRM", whatever that means.
Also note that you don’t necessarily have to abort the automatic installation procedure either. Once you have copied the install executable, which is only “revealed” once the Gamersgate application have started the installation, you can go through with the installation and then use the correct setup.exe if you would like to install and play the game in the future.
If you don't abort the automatic installation procedure, and you go through with the installation, do you still get the option to save the temporary files?
Have you ever used this (or a similar) procedure on other game download sites?
Did you come up with this procedure on your own, or did you learn about it from somewhere else?