I wouldn't be surprised if it were true. Gran Turismo, whilst being one of the greatest series ever made, is the biggest money rinsing enterprise going.
GT PSP that was never ever going to be released - just hyped to sell PSP's, concept games that serve no purpose other than to rinse money for a work in progress game. No doubt you'll have to buy half the game on the PS3 Network anyhow.
Don't get me wrong, I love the GT games but utterly, utterly hate the way they financially rape you in a blatantly obvious way and dont even try to hide it.
Though I dont believe in it, This is one game I would be tempted to pirate purely on the principal.
Can you please point to us where GT touched you ? There are far worse money-making exercises in consoleland than what is regarded as one of the best driving series around. We're being buttraped by microtransactions and online fees left and right. I don't think GT is high on the offenders' list for gouging wallets right now.
And piracy sucks. You suck.