It has always been my understanding that Boston's Logan International Airport is not suited to a true hub operation because of geography but also due to the lack of adequate facilities to support a hub (a large and expandable air terminal, land space, and so forth). Can any one confirm the rankings of US carriers at Logan in terms of activity (flight departures daily...)

1). US Airways + US Airways Express + US Airways Shuttle

2). American Airlines, American Eagle

3). Delta Air Lines, Delta Connection, Delta Shuttle

4). United Airlines, United Express

5). Continental Airlines

6). Northwest Airlines

7). America West

8). Frontier, Midwest Express, etc...