On the sharpest forum for XC-skiing in Sweden "Skidpepp" following post were published yesterday (my translation):
"Insider info from the racing teams - yes, Sweden didn't have super-surf under the skis. A noticeble but small difference how it turned out between different runners/skis, but generally all skiers felt that they didn't get the release that they wanted, but rather a "braking" effect. Maybe Anger had a hard time anyway, but Calle was clearly annoyed with the skis. Most annoyed however was the Finnish team that were terribly disappointed and even Pärmekoski was somewhat dissatisfied, something she rarely expresses.
The problem is that we've got newly fallen snow mixed with artificial snow that has been previously salted and competed on, which brings out dirt . This also in combination with freezing temperatures around zero, which makes the snow "fat", which actually means that it contains more than just water crystals (salt, dirt, wax residues). Conditions that are ideal for C8 fluor wax which is today not allowed. The waxing teams has some work to do in the coming days".