[Aqwis]

I disagree: try comparing pressing immediately after pouring water into the Aeropress versus pouring after waiting for 20-30 seconds or so. (If you press immediately you're going to end up with some really week coffee.) The pressure helps but most of the extraction is due to immersion even in an Aeropress. Most people who use the upside-down Aeropress method seem to let it brew for even longer, up to two minutes.