Other than the few boards that supported downloading "packets" of message board data ("QWK packets") you were connected to the remote board the whole time. I got started at 1,200 baud (approx 120 characters / second), and moved up to 9,600 and eventually 28,800 baud at the end. At those speeds you're not downloading much very quickly. You're basically interacting with a TUI-based application as a very slow serial dumb terminal.