Have you been reading the same thread as I have? I think it was pretty clear from the discussion that Con was the must have stat for 3.5E and that characters in 4E are making do with less Con than they did in the previous edition....They are a master stroke on behalf of the designers and make Con into a vital statistic (Whom I believe was the cheif in the Asterix comics)
Additionally, it seems that many characters are not fully utilising their surges before they have expended all other (non-at will) powers for the day and feel obliged to take an extended rest (where possible).
Con is great, but where is used to to be the second most important stat (behind their primary stat) for many characters, it is now more on par with all stats.