I can't see how a breakfast ride (or any other restaurant ride for that matter) is any different than a lunch stop on a century ride. When I rode centuries with my buddy, our lunch stops were also a rest break, so we were off the bikes for a half hour or so - not a 'potty-break, grab-a-sandwich-and-Gatorade-on-the-run' pitstop affairs. Any tightness was worked off in the first few minutes of riding... The 'hammerfest' group in our club rarely stopped for anything. They rode centuries like they were in a race.