I got the impression that they were comparing the 2 different setups that people might typically use, so the scientific thing to do would be to run different software. When doing comparisons, it is generally a good idea to use the things you want to compare (here that is SUSE/OO and Windows/Office) and not something else.

If you want to criticise something for not being scientific, I suggest the following general sort of points:

1. The person in control knows one system a lot better giving than the other giving one an unfair advantage.

2. The tools used to measure the time wasn't correct.

Your points seem to be that science isn't allowed to compare things (which is absurd) and that some site doesn't allow Linux downloads, which has nothing to do with the validity of the results.