I work almost exclusively in small (<100 employees) firms, usually no more than 20 developers, and it’s a complete mix here too.

One firm might have the most dialed in effective team you’ve ever dreamed of. The next four are average or OK. Then you get companies run by absentee owners and half the developers are stacking a $150k a year paycheck and literally not working at all. The company itself is highly profitable so the owner doesn’t care

It’s just a mixed bag all over everywhere you go. No generalities to be found in size but only in culture and outcome.