1) You implied "unfair" by opining on what they would have to do to be "fair"; and you said something less vague than "unfair", you said "unfairly" targeted at low-level languages. If you don't mean to say they are "unfair" then your words are going to confuse ;-)
3) GP? Your opining about "selecting the problems" doesn't support the claim "targeted at low-level languages" anymore than it supports the claim targeted at high-level languages :-)
As you noted the important thing to remember is that timing measurements are not promises, and they aren't general answers to the question - Will my program be faster if I write it in language X?
So don't say that they are!
2) "The nice link you posted sums it up well"
I agree - but then I wrote those words.
3) "there seems to be a bias in selecting the problems solved in the benchmark games"
You still haven't said anything that suggests they are "targeted at low-level languages".