Well yes........now you mention it............there IS quite a lot of whirring and chain clatter going on. I changed wheels, cassette and chain all at the same time, and while there is no obvious mis-indexing going on as far as I can see, the drive is not as stealthy sounding as it had been with the original equipment .
I don't know which element of the change has caused the increase in noise - and know that some level of base-level noise is to be expected (we are, after all, talking about chains and cogs and mechanical activity)...but admit I was surprised by it all and can't really put my finger on it. The wheels themselves, however, DO roll far smoother than the old ones, and I presume the constant ticking and whirring is just a trademark of shimano wheels?
Possibly??
w