If this is true, Netanyahu is seething right now.
I predict Mossad will be busy this week.
No, he is happy. Imagine if Russia warned Iran after the planes were in the air! If true, this is a big boon to Israel that the Russians have tentacles into Mossad or are using advanced electronic intercepts. Israel now has the time to eliminate these leaks, and Iran will be worse off when the real attack comes, as they will be deprived of Russian intel.