Bread in North America has gone up a LOT more than from $2 to $2.10. By my reckoning, the bottom end stuff (eg Wonderbread) is not far from double what it cost 5-10 years ago.
Ditto for all kinds of other products - eg eggs are tremendously more expensive than they were back in the day.
Ironically, the good stuff hasn't increased in price nearly as much, making it increasingly attractive. Granted my situation is not completely mainstream, but regardless, I get my completely organic free range eggs for barely more than 30% of the megamarket price for generic factory eggs.
While I believe the article underplays the impact on Americans, I do agree with the premise that the impact is far, far worse in many other places on this planet. IMO we are feeling the pre-shocks of a tremendous looming disaster - personally I fully expect total human population to meaningfully decline over the next 20 years.