It's noticeable that CRU doesn't actually give the context for Jones's comments. In the previous email in the thread, Trenberth says

The question is whether these [two possible presentations] might help get us on the same wavelength or highlight disparate views.  To the extent we can get on the same page, so much the better. I also have some draft material, adpated from last time, on letters to CAs recruiting them to do the task required (to be sent by email).  Question, should the LA send these or us?  It may carry more weight if we send them.

It may also give us more control.

Succinct and clear text, my foot.