Was he/she well-behaved in public as a toddler?

We struck gold in this department...LO is amazingly well-behaved in pubic. She has never cried in a restaurant (and we eat out pretty regularly). Yesterday we were in the AT&T store for an hour and she didn't make a peep...she just happily chewed on her Sophie and people-watched.

Will our luck run out once she's mobile? If your LO was well-behaved in public as an infant, was he/she still well-behaved once becoming mobile?