Top tournament pros are good at what they do, but most suck at live games because they aren't good poker players. They play tourney strategy very well. That is the beauty of live games these days. All these people get fired up watching no limit on TV and haven't a chance playing a live game. Not much action since TV shows are heavily edited so these players have no clue that most hands are supposed to be mostly raise and fold. They get bored and remember when some star turned a hand like 75 into a big winner and they play them. They don't realize in a live game playing top notch starters and playing them hard is the way to win. Hard to turn a dog hand into a winner often in a live game, so I say "come join us"!
On a side note best tourneys in general are at the Mirage for the higher limits (around $100 with some rebuys) and the Orleans for low end (mostly $20-40 buy ins). Other places have decent tourneys, but can suffer from poor turnout. The Plaza has some good structures and timing (midnight anyone?), but the place is such a dump they rarely get half the players involved that you see elsewhere. I hear GD runs a good tourney, I will have to stop by soon to play in one.