Senior men do hate to play from the red markers and some clubs put both red and white on the forward most tees to accomodate them. Overall, however, I think male ego is slowly fading, as more men are willing to play under 6K, whereas my father had to play over 6K, no matter how old and short he had become, so that's a good thing.
Architecturally, whether the ASGCA LongLeaf program, Tee it Forward, and others, the trend is to shorter courses from the two most forward tees. The movement is not new, and is slowly gaining acceptance. I was quoted in the Wall Street Journal in 2008 regarding the need to rethink basic tee placements.
The math is pretty simple. Starting with the idea that all players should be able to hit greens with two good shots, and maybe even play similar clubs, if tour pros average 300 yards and play 7500 yard courses (that is a bit high for the PGA Tour average, but I like to round shamelessly....) then the 150 yard forward tee players ought to be playing at 3,750 to hit similar clubs. The max they can play and hit most greens is about 5,000 (150+130 3Wood) X 18) and anywhere under that allows them to hit most greens with something other than max length, with many courses about splitting the difference somewhere over 4,000 (women have golf egos, too)
Senior men at 180/300 yards need 60% of course length to play the same clubs, i.e., 60% of 7500 is 4,500 yards, and a max length of about 6,120, with anything in between being comfortable, or at least more comfortable. I found that senior men, when doing internet research about new courses to play actually actively look for a tee set at 5,500 to 5,700 yards, but they really should play at just over 5,000, again, as a concession to ego and going under the 5K mark.
All that said, and because I was an early convert, I am still surprised at how many architects still design tees that make courses "too long" at least IMHO.