By far the greatest augury of [their new venture] Apple was the Beatles’ appearance together on television, for the first time in two years, to perform “Hey Jude” on “The David Frost Show”. The studio audience came and stood around them as Paul, at his piano, sung the wistful, wounded ballad that turns, midway, into an anthem seven minutes long. At the Abbey Road session, all the the forty-piece symphony orchestra had joined in that mesmeric “la-la” chorus. So did the studio audience – and much of the country – join in that night. It was as though the Beatles were reaffirming their oneness with their audience and with each other, instead of beginning their drift into chaos and bitter enmity.
– Philip Norman, Shout!