Checking all of the prices on that page, food prices have clearly been inflating faster than core CPI. Poultry has inflated at an average rate of 8% for the last 16 years.
Aye it would be interesting to correlate the S&P 500 returns to food prices alone over the last 15 years of zirp. A higher “real” inflation rate on food could indicate that many retirees budget projections are broken.