Having once been regarded as the brightest rugby talent in his homeland, he more recently played at No.10 in his national team's 2-1 series defeat by the British & Irish Lions.
Having made his international debut at the age of 18 and also showing a proficiency in a variety of positions - he has been fielded at fly-half, centre, wing and full-back - London Irish seemed vindicated yesterday in announcing their intention to unveil a "significant player signing" this morning. O'Connor then dropped a bigger hint that he was the player in question when he posted on Twitter: "London bound for a few months, can't wait."
Joining the Aviva Premiership side is being treated as an opportunity for success by both parties, then, although the Australian will perhaps also regard it as a chance to take a break from questions about his attitude. The 23-year-old is a known talent but also has a penchant for getting into trouble - being dropped by the Australian Rugby Union last month after an incident at Perth airport after which O'Connor reportedly was escorted from the premises. Ewen McKenzie, the Australia coach, later conceded that O'Connor had to "modify [his] behaviour".
It his ability with a rugby ball which would seem to have made the biggest impression on London Irish, though. "Any team in England or in France would be lucky to have him," said Brian Smith, the Premiership club's director of rugby.