I've shown her some raw data from Indeed and DICE, but the reason why I've turned to the community is this:
She's not impressed with the raw number of open positions. If that were a conclusive indicator, then getting a marketing job would be a snap in the Bay Area, but I assure you that it is not. I tried explaining to her that price (or salary) is a good indicator of the saturation rate of the market, but she's not convinced by that argument. (I'm not sure that I am either. It could be that the salary averages are being driven up by more senior ruby positions that I wouldn't be able to qualify for in less than a few years.)
That's why I'm hoping to get some data points from employers who know whether or not there is actually a dev shortage like many people claim.