I guess there are quite a few people out there now who are remastering Knoppix and distributing it to large numbers of people, so I'd be interested in some estimates:

What proportion of the laptop and desktop PCs work fine with Knoppix, for non-technical users, doing something useful for them, just by putting the CD in and without entering cheatcodes or doing anything non-obvious?

(To "do something useful", I'm going to assuming you need a functioning GUI, keyboard and mouse, with internet access. I'm also going to assume that my non-technical user can put in his ISP's username, password, phone number, but can't do any more than that.)

To start off, here are my estimates from a fairly limited number of tests in Japan:

Desktops:
Too little RAM: 30%
Video problems: 5%
Keyboard/mouse problems: 0% (Can't be right, but I've never had any...)
Network card or modem unsupported: 25%
Total unsupported bearing in mind overlap in the above: 35%

Laptops:
Too little RAM: 30%
Video problems: 25%
Keyboard/mouse problems: 0% (Can't be right, but I've never had any...)
Network card or modem unsupported: 30%
Total unsupported bearing in mind overlap in the above: 50%

Related to this, is there an easy-to-define set of computers that we can say with 90% confidence will work with Knoppix and derivatives?

For example, if I distribute a CD and say it works with "desktop PCs with broadband", would that get me close?