The instagram community went a buzz this morning with the news that a change has been implemented to the app. First off, the notifications will not help much when turned on in the upper right corner. The cries to #turnmeon will not do too much but allow your phone to notify when that person has posted. This feature is definitely on right now. It doesn't change the order of your feed, nor has that feature been implemented.
In fact, if you go to their twitter feed you can see that "We're listening and we assure you nothing is changing with your feed right now. We promise to let you know when changes roll out broadly."
Your feed may change when this rolls out, but posts will not disappear like Facebook has so blindly done for those with more than the average amount of followers.
For now, continue to peruse the feeds as normal. Begging for notifications will ensue from certain masses but rest assured, that only delivers a bubble on your phone screen that says "So and so posted a new selfie" :)