Possible. Unlikely. My fan seems to be more than some. W10 is a bit all over.
As i say, it entirely depends on your usage, but it just seems odd that most peoples fan seems to have stayed the same, but Mitch seems to have had fan issues with win 10 from many many builds ago. Just saying that there is enough anecdotal evidence on this forum to suggest that this is not normal for win 10, and that so many things can go wrong during updates etc, and that many things can be sorted out with nothing more than a refresh. Per the first point though, would be interesting to learn if there are any specific applications running on his machine. It could just be that a specific app just isn't jiving well with 10. I'm just a hobbyist, i like building things not reading about codes and bugs, so i genuinely know nothing on this topic, but know that i and others don't experience this.
What i do experience, is that Panos or whoever it was at the sp3 launch conference, "fanless" can go and **** off. When i load up a game, this thing on the other side of my room is indescribably louder than my main gaming rig which is just using stock chasis fans and intel hsf etc. That's the one thing i want in the sp4, keep the cpu performance, does the job, i'll not say no too more gpu performance, but if it were fanless it would be a pretty formidable travelling device (i'd be pretty pee'd off if i was sat next to someone on a coach/plane/train with a device that makes this much noise)