Look in to my eyes - tell me your deepest secrets
Analysts from Gartner, Forrester, Ovum and the like hold an unnatural power over the sales and marketing departments of many vendors because the CIOs of the potential customers have to be able to wave an industry report under the noses of shareholders if things go wrong. So (having been on some of those meetings in my past) those sales/marketing staff really are incredibly willing to hand over incredible detail relevant for competitive insight. The vendors not hiring have good cause to be concerned about an immediate (no break) shift from senior Gartner analysts to leading the competitive team on a competitor, even if the NDAs should carry forward.
It does say something about an ex-analyst that they opted to put just about the most inflammatory job title imaginable in to the public domain though.