Went from Tsaritsyno to Kursky vokzal by D2. Nice.
They use dedicated platform (5th or 6th, dont remember), farmost from the vokzal, for D2, and installed metro-like turnstyles in tunnels-underpasses.
In Tsaritsyno station, on the way to center, they also use dedicated platform.
About Aeroexpress, it will stop on several stations besides Belorussky, this will prolong travel time 35 to 45 minutes at least (from Belorussky to SVO).
SO WATCH TIMETABLE!
All the world's Kremlin,
And all the men and women merely agents