going to try address the original topic. There is anti-everything? I'm going to assume, bias is the same term as anti-MS, or Pro-other.
If we see bias/slants in political journalism, environmental journalism,then it must exist in gaming journalism.
Gaming journalism likely suffers from exactly the same type of bias, except instead of left or right, we see their platform of choice. Happens, and it doesn't surprise me.
The biggest difference between regular journalism and gaming journalism tends to really come down to quality. I've found most gaming 'journalism' sites are about the quality of the 'Sun' and most other sites have tabloid quality. If gaming journalism was physical, you'd see it at the check out line at the supermarket.