The arithmetic
Time three complete rounds, including queue. Say they measure 9, 7, and 8 minutes: the median is 8. A 60-minute session then holds 7 rounds (60 ÷ 8, rounded down — a partial round pays nothing but practice). A 30-minute lunch break holds 3. If your lobby keeps huddling and dying early, your minutes per round shrink and the same session holds more rounds — that dividend is the whole economy of playing well.