I find it interesting that pilots are willing to go to court on this one. In my experience lots of 'promises' are made at interview which usually turn out to be only possibilities and not actual promises. A lot depends on how 'promises' were phrased at the interview.
I notice that many companies tread a fine line in their advertising with a lot of spin involved (where have I heard that word before?). Easy's adverts in Flight are clearly examples of such spin. I would not be surprised if they used such techniques at the interview as well.