The main reason for us to start tandeming (back in 1975) was so that we could ride TWOgether!
Kay was perfectly able to ride centuries solo, but by doing it on the tandem we didn't have to look over our shoulder to see where the other one was.
Riding tanden works equally well with a partner that is either slower/faster/better than the other or equal in ability.
We soon developed our tandemtandem smiley..gif riding style, which is totally different of what pilot does on a single bike.
Pedal on!
Rudy and Kay/zonatandem