Well I wouldn't jump to conclusions until I heard and understood why the IPT chose to do it that way. The staff at the tournament seemed to be quite busy handling their various duties - perhaps the organization and payout of the players was better done all at once. The tone of your post also suggests that you're doubting the IPT even paying out.
Now, I'm sure that the IPT got a kickback/deal on the venue for producing ~200+ guests for at least 3-4 days. That's an absolute minimum. Only a handful stayed elsewhere. Most came in on Thursday/Friday for the mandatory Saturday player's meeting, and were there for at least 2 days of 1st round action - players did not know which day they were going to play on until the players meeting when the schedule was handed to them in their bags. I thought a player's matches would be spread over the 2 days, instead the groups were divided up. No one is going to schedule a checkout and flight the exact day they get eliminated, no one knows how long they'll be in and such a plan would be defeatist in nature - truth is, being so competitive and positive about winning, many players elected to stay the whole tournament believing they do have the chance to make it deep, and if not, at least watch the remainder of the greatest tournament ever.
Anyway, I'm sure 100% of the folks used the "player deal" to get the lower price on room at the Venetian, by doing so, the Venetian knows exactly how many people and how many days worth of business the IPT brought in. People have to eat and drink too...It must be awefully expensive to rent that massive (and beautiful) hall for the tournament....
I went to this tournament with a player and that player got paid on Sunday. I know a different player that got eliminated 1st round and left 2 days later - I can find out real easy if the IPT really mailed the check out. But seriously - why would they pay everyone on Sunday in FULL and somehow conspire to cheat or delay the other players payment via mail?
Guys, the IPT is for real (at least so far). Holding them to every single letter and detail is a little extreme and unfair. I think the spirit of the IPT's message is that players WILL GET PAID. Rather than get dragged out, ripped off etc...