Yeah I have to disagree. As a player who typically plays fast paced worlds, I plan to jump in this and play it seriously, so that I can have fun on a new grepo server without quitting en108. I think the best option is to alternate between 1/1/1 worlds and 4/3/3 worlds. (And I think en100 proved that speed 6 worlds are a viable option from time to time...no?) These attract the two different audiences of grepolis, those who wish for a full-time hobby, and those who wish for a part-time one. The real problem are the worlds in the middle, like speed 2's, which don't really piss anyone off as you see with 1's, but they never appeal to anyone that much either.
Speed 1's are popular, as the user numbers show, they are just a minority that is not well-represented on the forums, because these players spend less time per day on grepolis, and therefore less time per day on the forums as well.
As a random side note, I think that this summer wasted a valuable opportunity for a crazy-world, as we've had a few times. Let's have a two-week-long speed 15 world or something...1 day BP, 6hr foundation time, etc