I have noticed that after 9.00 am, there is more conversation to be heard on buses than before. Before 9.00 am people more often than not, keep themselves to themselves by reading, listening to music, checking their 'phones or generally doing nothing but look out of the window. After 9 am, the people who travel do so more by choice than having to get to work on time - they are in freer and choose to avoid the rush to work. Also, they are often older people with bus passes. I have also noticed that as people get older, they are more likely to talk to people they don't know. It's a different world on the bus either side of 9.00 am.