So removing the bus stops costs you 2 1/2 minutes of walking (150 seconds). And gains you 20 seconds per stop removed that you pass. Therefore you need to pass 8 removed stops to break even. Which seems like quite a commute to me.

I agree that low-stopping services are a good idea. Particularly in the suburbs. Use the high-stopping services to get people to the low-stopping services - and let them change buses for free/cheap. But I think that you still need regular stops, particularly if you are dealing with elderly people. And that in the middle of cities it's totally worth having a lot of stops, so that people can easily find one.