I've been on both, but I also realize companies putting out a list of almost silly requirements that just about no person ever could meet has made many people 'stretch' their qualifcations too..

I have programmed against and Oracle DB becomes Oracle DBA experience, etc. Because when you do want an actual DBA that has a bit of programming background, you get so many applications for the first type.

Additionally, things like a Linux Systems Administrator can come in many different strenghts, and your going to attract a different level of skill by posting your salary range as 60-80k, than if you post 120-140k. But many employers don't want to post it at all, and then it seems you only get the low end guys applying.