This is possibly because Ilan has traditionally been a Taiwanese-speaking area, and also perhaps because in 1990 Ilan started teaching Taiwanese in schools, which may have strengthened Ilan's residents 'Taiwanese abilities even further.
如此可能由於宜蘭市是傳統台語社群，另一方面宜蘭從一九九○年開台灣風氣之先，開始實施母語教學，越增強宜蘭人的台語能力可能也是原因。