Most toilets in the US, especially commercial ones, flush with sufficient water and power to remove any residuals from the bowl. Depending on circumstances, a second flush is occasionally necessary. I have monstrous digestion and have never needed a brush to finish the job; toilet brushes here are just used for periodic maintenance, to keep things shiny.
Interesting! This article confirms what you're saying: toilets in the USA generally use higher water pressure, making residual less of an issue. The more you know...
Yea I'm mow super confused as to Why there is a difference.... it seems so illogical to have a toilet that can't empty itself completely when flushed...