It is definitely an issue with management creating the kind of environment for that to be accepted and grow. I know a few great people that work/worked at other parks where they were all about hitting intervals, and now they're sitting back taking their time checking and dispatching at SeaWorld.
To be fair, there's very few times during the year where SeaWorld is busy enough to actually need to worry about hitting dispatch intervals for more than a few times in a row, but letting that take hold how it has isn't good. Not to mention its just bad guest service all around, no matter how busy it is.