The Secrets of Steve Tappin

Has Steve Tappin - once a headhunter, then an author (briefly) of The Secrets of CEOs and now some sort of coach to chief execs - been pulling a fast one with his entry on Wikipedia?
Tappin has been claiming via the online encyclopedia that he's a mentor to some of the top names in British business, including Sir Terry Leahy, John Connolly, and Andy Haste, posting: "Steve is a CEO confidant for some of the CEOs of major global corporations such as Tesco, Deloitte and RSA applying the Secrets of CEOs to global corporations".
Oh really?
Tesco clarifies: "Sir Terry was interviewed last year for a book co-authored by Steve and Andrew Cave called The Secrets of CEOs. I am not aware of any other connection between the two."
RSA adds: "I can confirm that Andy Haste has not hired Steve Tappin, or anyone else, as a mentor," while Deloitte simply refuses to comment.
Strangely, after I raise this, Tappin's Wikipedia entry miraculously changes.
It now reads: "Steve is a CEO confidant for some of the CEOs of major global corporations. He is actively involved in many of top performing global businesses such as Tesco, Deloitte and RSA applying the Secrets of CEOs.”
Which is quite different.