I was kicking my heels on Tuesfor 3 hours at AMS and had a good old mooch about.
Where the likes of Sleazyjet etc come in, it is indeed segregated. But in Terminal 1 and 2, its not. Terminal 1 is having a lot of cosmetic work done, but none that I can see that would segregate and around D spur there could be a possibilty to do this, but it would need a major overhaul and the delights of the Irish pub etc would only be accessable for a few rather than everybody.