is it faster than Nikon P5100???

The P6000 has the exspeed features, which should speed up image processing and lower time between photos. So yes, it is faster in taking and saving a picture. Also faster fps, I believe.

But I'm not confident that with that that number of megapixels if faster image processing doesn't add more noise to the party. As we've discussed in the past, it's an easy to trap to buy into the "more megapixels must be better" myth. It isn't. The argument is essentially this: CCD chips on point and shoot cameras a smaller and as such, fitting in more pixels causes them to lose light sensivity. Sure, there’s more data on the chip, but the chip can’t absorb the light data and what it ends up with is a picture that has more noise than image quality. In addition, the more megapixels a camera has, the larger the lens it needs to provide the clarity it deserves and prevent diffraction due to a loss of detail with smaller apertures. But since we’re talking portable point and shoots here, those large lenses simply aren’t
being made.

Finally, with larger mega pixels comes longer saving time due to their requires huge storage capacity, or more compression if not storing images in RAW format. The result is a noisier image and a dissatisfied camera user who thirsts for high quality and speed but fell into the trap of "more must mean better."

And I think that if a camera is using a sped up image processing algorithm, that there must be some trade-off to
it and I bet it's more noise. Especially at higher ISOs and lower lighting conditions.

It all comes down to how large that CCD chip is. For in the end, relying on a smaller MP that can balance all these needs may indeed be a better answer.