Road vs tri bike (1)

i know ive posted something like this before, but lately two ironmans have been won by guys competing on road bikes, and apparently luc van lierde was on a roadbike when he won hawaii (???).

these 2 guys being simon lessing and stefan holzner. holzner wasted everyone on the bike at ironman germany…so really are the benefits really there for EVERYONE in terms of using a tri bike? why do some of these guys prefer roadbikes? there’s got to be some decent explanation…