No, since they are transmission lines over a groundplane, they are actually pretty close to purely resistive. The thickness of the FR4 prepreg laye between top traces and the plane underneath is something like 100µm, so electrically the traces are almost unaware of each other, each acts as separate microstrip of around 50 or 60 ohms. The majority of electrical and magnetic field exists directly under the traces. There also are few 100 ohm differential pairs also on this board.
Microstrip signal propagation velocity for FR4 is of the order of 15cm/ns, so the skew being removed is of the order of a few 100ps or so.