You see it on the turkey videos all the time, mostly with Merriam & Rio hunts ...

... they have 3 gobblers comin'
(racin') into the set, & all 3 are gobblin' like crazy - the hunter hits a call, & all 3 gobble in unison in response to the call ...

So, are gobblers #2 & #3 shock gobblin' to gobbler #1's gobble, maybe - but which one of the 3 was gobbler #1 ?? - after all, they did apparently gobbled in unison ...
... but just maybe, natural
"competion for the hen's attention" may be more likely, when there's gobblin' in unison in response to a yelp, cluck, or what-ever type of turkey call ...
They don't always gobble in unison, sometimes the gobbles by the different birds are staggered a little - maybe it's just a little different reaction timin' by different birds - some quicker than others ...
... but either way; gobblin' in unision or staggered; in response to a turkey call, might still be considered as a gobbler's natural reaction in the spring, to try to draw the hen's attention to himself ...
...
just a thought ...
