While I'm fully aware of significance of this accomplishment. It's something only tech enthusiasts understand and appreciate. These are the very people that are accused of prefering Android over the much simpler & basic iOS.
Therefore the point is, it's lost on the mainstream customer who doesn't care about anything other than the Apple logo, and the fact that they want to be seen with an iPhone or iPad.
Meanwhile the die size is not going to help Apples dismal stock performance. This is, after all, a publicly traded business.
Here's something about public perspective on Apple:
http://www.france24.com/en/20130309-googles-star-rises-apple-fades
Higher yields and better power efficiency on the chips used in the popular but low margin iPad mini, allows them to increase margins (they can also put a smaller battery in the iPad mini and iPod touch while getting the same performance), one of the issues investors had with the previous quarter.