This is actually a good point... I have a very fast 16 core PC, but typing in Google Docs often has latencies. Everything in WP is instantaneous, even on my 6mhz 286.
Watching someone use the old text-based terminals you'd see at Frys or a bank vs watching them fight with a mouse-based web GUI is instructional; with the old text terminal you could enter the whole transaction as one long string of characters into the buffer, and even if it took time to load the screens, it would faithfully execute exactly as you ordered it to.