Dear Sam
About the songs, can you recognize any lyrics? or have the names of them? this way i could tell more, chifeteli can be very slow or very fast depends.
Now about the rythm etc question, the best is to read our own Chryssanthi Sahar article about greek chifteteli (she is greek also).
http://www.orientaldancer.net/articles/tsifteteli.shtml
Just ask anything, we love so much greek chifteteli and it pains us that is not represented abroad in the right way (beside Chryssanthi at Germany) that we have to do something
Maria Aya