Here is one of those newspaper snippets that seems carefully designed to irritate its target.

In this case, it is Rightmove – and to a lesser extent, Zoopla – that has reason to feel needled.

In the City diary in the Telegraph, the headline “Why Rightmove chief won’t be calling agents for London house” is nicely calculated to annoy.

The piece pours a small bucket of cold water over the theory that Rightmove chairman Scott Forbes recently sold £7m worth of shares in the company in order to raise money to buy himself a posh house.

Enter upmarket London agent Trevor Abrahmsohn who tells the Telegraph this is nonsense.

The real reason, he suggests, is that Forbes decided to halve his stake in Rightmove because of falling share prices.

And the catalyst for the 14% fall since February? It is of course Agents’ Mutual – of which Abrahmsohn is one of the original founders.

While Agents’ Mutual won’t launch until January and does not even have a name for its new portal yet, Abrahmsohn says it already having a “tangible deleterious effect” on the Rightmove and Zoopla online listings duopoly.

“They have treated estate agents with jaw-dropping arrogance,” Abrahmsohn tells the Telegraph.

It is interesting that the public relations battle is already hotting up – when Agents’ Mutual has, as yet, no formal PR in place. It is also fair to point out that Rightmove’s shares may have dipped, but so have a lot of others, and Zoopla did pull off a successful stock market launch only last month.

And as it happens, both Rightmove and Zoopla shares headed upwards yesterday. So much for the influence of the City gossip mongers.

But we look forward to the next round with interest.