Possible Clues:

• Bourgeois (first 2 letters + last 2)
• Bourgeois
• Girl admits Duke wrongly called less than noble
• Like much of suburbia
• Ordinary people
• Note girl is representative of one sector of society
• Note girl's social group
• Large group with upper and lower segments
• Note (as the answer here) female's assessment of certain 11s (24-25's)
• Section of society below the aristocracy