Queen Letizia in a Tracksuit-style Outfit

Queen Letizia of Spain hit the headlines at an official reception in Zarzuela Palace.  The Daily Mail reported that she wore a plain, black T-shirt, black trousers with a sporty white stripe, high heels and diamond and sapphire earrings.  Some people found this casual look disrespectful:  Did she dress down for the occasion, or is she a trendsetter? Are tracksuits stylish now? In fashion, every one has their own taste, what is your opinion?