Deliberately delaying Salah is a sign of weakness of Iman (faith). Delaying the Asr Salah till the time that the sun loses its brightness, unnecessarily, has been attributed to hypocrisy in the above Hadith. Whilst the Salah performed in this manner is valid, one should not unnecessarily delay the Asr Salah. If one foresees a delay e.g. traffic, it should rather be performed before leaving.