DF is obviously biased towards Xbox. It's totally evident watching the tones in the videos, the words they choose, the different way they react to things and so on.
They're still professionals but the bias is absolutely there.
There is a reason only Xbox fans in these threads pretend not to see it and that's because it's good for them they act that way (at the same time they attack NXgamer and other people for not being positive enough towards Xbox though
)
And it's not a recent thing, evidence has added up for years since... the PS3 vs 360 days?
It's obvious they have a really good relationship with Microsoft, which is proved by the fact they were chosen as partners to make important hardware related annoucements. Something that Sony never considered to do with them.
They have been seriously surprised to see PS5 doing so well in multiplaform comparisons, if everything had gone according to plan the PS5 should have been already labeled as 'underpowered' but instead here we are, PS5 is doing at least as well and the editorial line is pretty much to downplay and quickly sweep under the carpet every PS5 advantage and cheerlead with carefully selected titles, tones and words everything that goes in Xbox favour.
The good thing is that times have changed, they can do whatever they want but there are many voices now and their results will always be compared to others.