Chipotle's CEO Brian Niccol has addressed social media complaints about shrinking portion sizes, emphasizing that the company never directed staff to reduce portions. In response to the feedback, Chipotle will retrain employees to ensure consistency and generous portions across its 3,500 locations. This follows a Wells Fargo study revealing significant weight variations in burrito bowls from different locations. About 10-15% of stores, identified as outliers, will receive focused training. Despite the controversy, Chipotle reported strong quarterly earnings with an 11% increase in sales, driven by efficiency and popular menu items.