I wholeheartedly second this. I have an unique lens on this issue as I'm in a unique spot. Despite being Brazilian myself, for most of my career I worked and managed US based developers, and just very very recently shifted to working directly with Brazilians. I saw no major difference in responsiveness and "get shit done" (aka initiative) between those two cohorts.
The only thing that took me by surprise is that Brazilians DO NOT take well to getting busy outside of working hours. If you text someone during their lunch break, expect to hear a complaint along with your response.