Very shrewd move by Putin.. not a full withdrawal of course and could redeploy at short notice, but it's a proper fuck you to the Coalition forces and a media coup in the popularity stakes.
"I consider the mission set for the defence ministry and the armed forces on the whole has been accomplished," Mr Putin said in a meeting at the Kremlin.

"I am therefore ordering the defence ministry to begin the withdrawal of the main part of our military force from the Syrian Arab Republic from tomorrow."

Syria conflict: Russia's Putin orders 'main part' of forces out - BBC News
Analysis by Jonathan Marcus, BBC diplomatic correspondent

Mr Putin is effectively saying "job done" in Syria. He is clear, though, that a Russian air base and a naval base will remain, so this is not a total military pull-out.

Coinciding with the Syria peace talks, it is yet another sign of Mr Putin's mastery of diplomatic showmanship.

Russia has about 30 combat aircraft in Syria and a small ground component protecting them, along with an unspecified number of Russian advisers and special forces on the ground, operating with the Syrian military.

Russia's intervention has achieved its main goals - consolidating President Assad's position, enabling his forces to re-take key pieces of strategic territory and ensuring that Mr Assad remains a factor in any future Syrian settlement.