If it's still of interest here, I can post some observations based on pretty frequent travel to EU/Schengen countries with a Russian passport and long-term Schengen visa.

Entering country:
MUC, Germany - asking general questions about the length of stay, destination and a purpose of the visit. No problems generally.
HAM, FRA, Germany - either no questions at all or one question like "Are you going to stay in Hamburg?"
BER (TXL), Germany - 50/50. Sometimes asked questions about the visit, sometimes did stamping without saying a word.
VCE, Italy - no questions asked (thus have tried only once having a layover in Venice on my way from JFK to Moscow)

VIE, Austria - my favorite one, no doubt! Several times, they don't care AT ALL about anything. Once we were coming with my 2yr old son sitting in a stroller, so obviously an officer should have made certain movements with his head/body in order to see a child - NO WAY. He hasn't even raised his eyes, continuing to chat with his colleague sitting next to him and putting stamp on a page with previous expired visa (seems he has just found a page looking *like a visa* and put a stamp there not even trying to read it).

Leaving country - never had questions asked ("you go away? get lost!" )


I've been reading lately about the increasing number of tough questioning in AMS airport in Netherlands. I have no idea of what was the reason of this (there are rumors about Dutch officials getting information about possible terrorists having Russian and other ex-USSR passports which I find a little bit weird, frankly), but there was a case lately when a business traveler were denied entry to the country with a valid Schengen visa in his passport after spending several hours at a police station in the airport while his belonging were searched through. After all he got a formal rejection letter in Dutch stating something like 'providing false or incomplete information to Dutch authorities' and has been sent back to Moscow the same day.

I don't know it it's true or not, but it seems that he and his attorney followed up on this with Dutch consulate in Moscow and even got apologies from them admitting that the officer in the airport was wrong and he had no grounds to deny entry.
Anyway, it is becoming a strange trend with Schiphol lately, so if possible I'd prefer to avoid KLM while traveling simply not to face AMS officials. Maybe it's just a prejudice, but I find it easier (and nearly always - cheaper) to go via Germany on LH or AB.