The link is to Jose Romero's blog, but the original source is in Spanish. Romero's Spanish is better than mine, but I'd take him in an Arabic contest!
Russia is on a summer schedule of sorts (Off in Winter, long break in Summer), while Turkey is on the traditional schedule. Both leagues are better than MLS. Russia gets 3 Champions League spots and 3 to Europa League while Turket gets 2 and 3.
But Montero is already in Seattle, and already working out a bit with teammates on his own. On Monday at Training Camp Day One he will be there.
To the best of my understanding Turkey's transfer window closes 2 Feb, while Russia's is open much longer.