Well, I've ridden it for about 5 months, almost all of that with fenders (and hence without noticing the issue). Only after removing them recently and spending five hours staring at my wheel (I look like a less-skinny version of Chris Froome) did I notice it. But I've always found the bike a bit less than stable at high speeds on our local big hills. And I've found it hard to ride without hands. I wouldn't say I feel like it "pulls" to one side, but there is something slightly unnerving at high speed (I'd guess over 40-50kph; I have no garmin/gizmo)--a kind of wavering.

Thanks for the replies.