ten months is hardly enough time to judge whether it is an issue or not. a few of those nipples could be corroding as we speak, but unseen. carbon wheels are pretty new, so we probably don't have a big enough sample size of carbon wheels built with al nipples, that are old enough. i suppose that if the wheel is rebuilt, it would be more apparent too.
one of my wheels (not carbon) is now 9 years old. it has only ever broken one spoke on it, and i don't think i've had anyone look at it (truing/retensioning) for the last 5. maybe i'm a bit light on wheels, or maybe it was just a really good wheelbuilder, or i just get them overbuilt (32 cx-rays on an xc wheel). I can count on one hand how many rims have failed - almost all my wheels exit via a sale (either wheel-only, or on a bike).
My point is, I personally am used to my wheels lasting a long time - however, sometimes i wish they didn't (harder to justify upgrading). I certainly wouldn't be happy having some corrosion spoil my wheel (unless it is just a simple nipple replace job, not ruining the rim or spoke???) after, say, 3 years of using it. I have a few bikes, and don't use any one bike that much (other than the commuter), so i'd hate for it to be deteriorating while just sitting there.
other people might use the one set of wheels every weekend and/or regularly smash them on rocky downhills, and are used to re-building reasonably often. not me though.
my opinion would be that, until we have more info on the likelihood of anno al nips corroding on carbon rims, be prepared to rebuild your wheels every couple of years, or get brass nipples.
having said all this, i got a dt-swiss carbon wheelset a little while ago. just now, it has crossed my mind that it probably has al nipples in it.