伯爵茶现已是一類调味茶的通称,許多茶商都會生产,甚至有格雷伯爵绿茶(Earl Grey Green)之演變。即使如此,川宁仍被认为是伯爵茶最正宗、品質最佳的生产者。第六代格雷伯爵在商品外包裝上自薦:「川宁歷年來一直調製自己家族的茶。今天我很榮幸此茶以川宁的格雷伯爵茶之名,將家族傳統揚名世界。」(“Twinings has been blending my family tea for many years. Today I am proud that this tradition continues with the tea celebrated throughout the world known as Twinings's Earl Grey Tea.”)