Believe it or not, the replacement of ER6's own foams by Complies is one of the reason why I got into my shopping spree at the beginning of this year. And I ended up with a pair of T1 customs ! So yeah I've a pretty good idea of what you mean. They really pick up sweat like crazy, even during normal use.
Should be interesting to see the reaction of professionals on that yes. The years to come are gonna be really interesting, because we'll either the spreading of use of customs, or maybe more likely the emergence of new generation of universals. Could be that we see both, through the generalization of custom sleeves. I just discovered that Sensaphonics entered this market as well.