These experiments are indeed important as far as changing the paradigm. However, the case won't really be settled until we put a lander in a location where liquid water might actually be found at least for short times.
My favorite such site is Noctis Labyrinthus. It is near the equator so has high daytime temperatures during much of the year. And it is also low elevation so the pressure requirements for liquid water will also be reached.
But there are many sites on Mars with these properties. What I find interesting about Noctis is that it also has frequent low lying fogs:
This is a Viking orbiter image. An image from Mars Express also shows such dense low lying fogs in Noctis. It appears on the first page of this report:
Adsorption water driven processes on Mars.
D. Möhlmann
http://sci.esa.int/science-e/www/object/doc.cfm?fobjectid=36779
Bob Clark
Space/Science » in reply to Robert Clark? You have been vindicated!
re: Robert Clark? You have been vindicated!