Actually, most of the gear is Fixe ring anchors, or the nice ring-chain setups. Also, that is some serious misinformation about the raps being 25m apart (at least in the Bugs) as most are more like 35-50 m apart. The one notable exception to this would be the Kain route on Bugaboo.
Actually the NEW stations NOW BEING INSTALLED are 25 m apart. Eg rap from Snowpatch-Pigeon col down to S face of Snowpatch. See new Bugs guide from Elaho.
Its a convenience bolting for guides mostly so they only have to carry one rope.