Have you considered exactly how you're describing these prospective hikes to the members? Terms like "big miles," "20+ miles/day," "covering lots of ground" - those sorts of phrases sound intimidating, especially to newbies or casual hikers. Who wants to participate in a forced death march?
But look at how you described your actual hiking style earlier in this thread: "I hike from about 7am until 10:30, cook/eat breakfast; hike on until about 2pm, cook/eat "dinner"; and hike until 1 hour before sunset; set up camp, have a snack, read my Kindle for an hour, then sleep." Where's the death march? That sounds like a positively civilized outing! Just leisurely strolling along, with regular breaks for meals, until it's time to make camp. What's hard about that? Same hike, same mileage covered - but the description of the day makes it sound much more inviting. (For a general group, I'd push breakfast back to 8:30 or 9 AM and add a real dinner at the evening camp site, but those are easy changes, and wouldn't affect the day's mileage one way or another.)
Perhaps de-emphasizing the actual daily miles covered in favor of "just strolling along from sunrise to sunset, with regular breaks for meals" will generate more enthusiasm in your group.