It is obvious that one must be patient to eat mindfully. It takes time to be aware moment by moment. Rather than the usual method of eating raisins, which is to throw a handful of raisins in your mouth, chew a few times, and swallow, you are slowing your process dramatically for the full experience, letting the experience unfold rather than racing through it.
Biggest obstacle! I think our lives are so busy that eating like Europeans would be a huge improvement for me personally!