Of COURSE there's a cloud of suspicion. All of a sudden three American runners break 27 and 13 and two of them are from Schumacher's group and they haven't run those times since. How stupid do you have to be to not think something strange was going on?
They're just a lower profile group so they don't get as much publicity at all, good or bad. Rupp and Farah have Olympic medals and Kara Goucher has a WC medal, whereas Schumacher's group doesn't have any of those at all (as far as I know, correct me if I'm wrong).
Anyone with a brain realizes they're doping. They're just smaller fish on the international scene.