It's not as if Thorn, who so proudly represented the All Blacks between 2003-11, winning 59 caps, would have any desire to offer up any insights into the All Blacks. He's not that sort of bloke - he's built his reputation on his integrity and honesty, and he wouldn't walk into the Wallaby camp and data-dump secret intelligence that could prove invaluable to the Wallabies.
Besides, having last played for the All Blacks in 2011, he wouldn't have much in the way of current knowledge.
But even knowing that Thorn is highly unlikely to have offered a single word of insight into the All Blacks, his presence at the Newcastle training camp will have induced an uneasiness within the New Zealand coaching team in the same way the Wallabies would be curious to see someone such as their former captain, Nathan Sharpe, hanging around at All Blacks training.
No international rugby side likes to see one of their own disappear behind enemy lines. The All Blacks were wary when former coach Graham Henry finished up in 2011 and was then working with the Pumas in 2012.
They were equally cautious when former skills coach, Mick Byrne, who was with them from 2005-15, took the same role with the Wallabies last year.
It's a professional game these days and career opportunities arise wherever they do. Former test players and coaches follow the jobs, and there is industry-wide acceptance of that.
But that doesn't mean that former teams like seeing former players or coaches working for rivals.
They accept it, but don't enjoy it and Wallabies coach Michael Cheika - astute, driven and fiercely competitive - knows exactly what affect it will have had on the All Blacks, seeing Thorn in Wallabies coaching kit.
The Bledisloe Cup rivalry is far from dead. There is nothing but fight within the Wallabies and Cheika, who - by the extreme force of his will to succeed - is going to manage to inject a similar fire and belief within his players these next few weeks, while also doing what he can to unsettle the All Blacks.