This piece of information were released as their paper got accepted in the Astrophysical Journal.
And I do think the title refers to the fact that they have gotten data for all known planets. Interestingly the text say that they have found one apparent chemical imbalance in the atmospheres of the planets. Which might be read as that the planets are different than what our current models do predict for planets at the distance they have from their sun.

First Remote Reconnaissance of Another Solar System AMNH

As usual with press releases, the contribution of this work is a bit exaggerated. A spectrum of the outer planet has been taken before, showing the same "imbalance". The red colour (probably due to clouds) was already known a few years and extensive modelling has been done to try and explain this.

You are absolutely right, part of how they phrased it might very well be to market & position their institution and to serve as a boost for the time when it's time to send in applications for funds. I did find it interesting enough for a post since this were yet another examples of land based telescopes and instruments that have accomplished what we've been thinking would need space based instruments - until not that many years ago.

Even more inpressive results on these planets appeared in Science this week:

http://arxiv.org/abs/1303.3280

Pretty amazing they can do this.