My current job was listed as full time (Entry/mid level) but I'm a student and in my phone interview told them that - guess they wanted me anyway. My biggest value IMO is that I've dabbled with a lot of stuff. Okay I haven't worked on a personal project in Django, but I'm at the point where the exact language/framework is semi-irrelavant. I was confident I could, and was able to be semi-fluent with Django for example in a few weeks (only 25 hours a week).

My point is that what GP is trying to say is more about "Oh we listed postgres but they've only used mysql" if the person is motivated they should have no issues picking up postgres