I read this earlier this morning and had to reflect on this before writing. I do believe it has given us very insightful results of our industry and where its going. I wouldn't stick to these results as I would highly suggest by ten years time that the market will be reversed in quite a bit detailing these results.
What we know at the moment is that a lot more younger children are starting to code, and given five years time, there will be a lot more of us mid-level to senior developers and a new generation of coders that will more than likely beat us at our own game to some degree.
With the gender being female, I am increasing seeing that there are more women going into more technical roles, which hopefully will balance out the market.
Now what was interesting to see was where MySQL is standing, despite PHP has fallen quite behind int he market MySQL is still standing quite firmly.
Platform being Linux chosen over Windows and Mac for developers, that quite surprising! Maybe we are all fed-up with Apples costly macs that no one can afford ;)
Most Dreaded Platforms: WordPress - :D I predicted this exactly last year :)