I don't know. I think I'm with a few people here in saying that I honestly don't care what a person calls their animal as long as its well cared for. We have a few who technically could be called 'rescues,' four (soon to be three, one is being rehomed) race horses who were all crammed along with two more (already rehomed) horses into two stalls and shut in the dark for over a month, fed moldy hay and water, and had terribly cracked feet. Three of the six had underlying health problems including heart problems and severe ulcers, and one was not able to be saved. We took them in, rehabilitated, and are retraining them to go to new homes. I called them rescues and I stand by the fact that they're rescues because they 'meet' all of the criteria. We did not buy them (except for Peppin, who we officially adopted last month!!!), they came from neglect, and now are not neglected.
Then theres JW, who was abandoned in a field for two years before we took him in. Some could call him a rescue, but we don't. He wasn't thin, did need some corrective trimming though, and wasn't neglected (in a pasture with ample grass and water) He's simply an investment that ended up working better for both him and us.
And Sour...well...in my mind she's a rescue, but I don't actually call her rescued. She wasn't necessarily neglected or abused, although some very rough handling caused her to go completely sour (hehehe....sour) with humans all together, and it took two years to gain her trust and be able to touch her wherever/trim her feet without sedating her. She's still iffy with some men too. So technically she went from bad to good.
My point is that each horse has its own backround and its own personal story. We don't know the details of another person's horse, and thus I don't necessarily think that its fair to judge them. And what good does it do anyways? As long as the animal is well cared for and happy, does it really matter? Its not hurting anyone, and if it strokes someone's ego, then I say go for it. Theres a lot worse that could be happening.