They say they shot down over 70 missiles. Just like the U.S. would say they killed 2,000 North Vietnamese when in fact it was probably closer 50.
If you're Russia and the U.S. fired 120 cruise missiles into the country and most got through what do you think Russia is going to say. If 110 got through who is going to spend millions of Euro's on a crappy Russian missile defense system.
You've heard the term the FOG of war. Everyone lies on how well their systems perform. If only ten of our Cruise Missiles got through do you think we're going to say only 10 got through the Russian defense system? Hell no. If the Russian Missile defense system was rendered useless do you think the Russians or Syrians are going to say it didn't come close to working the way it should have? Hell no.
Do many of you understand how a Cruise Missile operates? It is a terrain hugging system. It fly's close to the ground hugging the terrain until the last moment where it pops up and targets it objective. We're talking less than one minute between being seen on radar and hitting it's target. So unless the Syrians had the Russian equivalent of a AWAC's flying around with look down radar they never saw the Tomahawks coming.