The alternative to this is to start soft and work up, which is my personal preference. If I'm know I am within earshot of a gobbler, I'll start off with the slightest, lightest call I can. If his head pivots around and he honors that call, I know he's hot on me. If it takes him 3 calls of increasing volume and passion to get him to answer, he's maybe thinking about me, but he's got something else more important on his mind. These are often times the birds that show up later in the hunt. Before I go hotter, I have to ask myself: before I go and drop my drawers for this gob and give him my A-List, am I sure I'm not giving myself away to Mister Silent-- the other gob that may not be sounding off yet? As that I'm playing the same bunch of gobs every day of season, I have to be careful what I show to these boys.
Assuming I get a gobbler on the ground cutting-in on my calls, I'm like the sonar man on a tin can. I'm only actively pinging when I need to. I want that negative delta range with zero-delta bearing-- collision course. Once they're hooked, I usually always give them as little calling as possible to keep the gob coming towards me.
Now, as I've said previously, I'm not fancy caller. In fact, I kind of expect the gobs to laugh at me when I go out. Based on that, I try to barely show up on the radar screen above the chatter of the other hens, at least until I find a gobbler that is interested. From that respect, I am sort of a me-too type of caller. I let the real hens do the worst of the fluffing on the gobblers. I save my hot stuff for turning his head later on in the game.