Yes, that may very well be true, especially since people are bound to stick their own air probes on the cooking grate to double check.
This is what drives me crazy about people putting digital probes on cooking grates so they can get temp right next to the meat. Hardly anyone does this when roasting a prime rib or baking a cake in the oven, but they insist on absolutely perfect, to-the-second temp readings in a smoker where frankly the temp fluctuation is much more dynamic at any given moment than in a kitchen oven.
And to address this point, someone (I can't say who) is coming out with a probe thermometer where the air probe is switchable between current temperature OR average temperature over the past xx minutes. That's probably what Char-Broil will be doing, if they're smart.