Can I run a different tire diameter in front and back? (2014 RWD)

There's a lot of posts in various forums saying there's no problem running a different tire diameter in front and behind (2014 RWD), but some posts claim that it messes with the ABS/Traction Control because of the different rotational rates. (talking about a 27" in front and 28" in back. assume I've re-tuned to the size of the rears.)

Anyone know what the real answer is? Just from reading posts I can tell there's a lot of people running different diameters but IS there something to be said about ABS/Traction Control?

Why would ABS/Traction Control NOT be affected or is that not how it works? (...because I don't know how it works.)

Thanks, but that doesn't get me any closer to a practical decision. Another way to phrase it relative to your answer is am I going to see a warning light for either the ABS or Traction Control? I'm sure the answer is going to be there's no way to tell at this point.

I know there's people out there running different sizes so it must be possible.