I think the Ortiz result was legitimate. Ortiz DOMINATED the first round. I'd give the second round to Griffen (but not by too much) and the third round to Ortiz.
Rnd 1: 10-8 Ortiz
Rnd 2: 10-9 Griffen
Rnd 3: 10-9 Ortiz
Ortiz wins, 29-27
As for Arlovski, I think he legitimized the comments people have been making that he was largely untested. The guy has NO chin. Silvia's punch was an "arm punch". That is, it had no legs or hips behind it (i.e. no power).
Silvia is a deserving champ, but the UFC needs to bring in a new Heavyweight. Monson is now the #1 Contender, and I think Silvia would drop him. UFC's heavyweight division just sucks. All of these pride fighters would, IMO, be the heavyweight champ if they were in UFC:
Fedor Emelianenko
Aleks Emelianenko
Mirko Filipovic
Mark Hunt
Antonio Noguiera (Big Nog)
Wanderlei Silva (he could bulk up to Heavyweight easily)
Sergei Kharitonov
Ricardo Arona (again, if he bulked up)
Even guys like Mark Coleman, Kevin Randleman, and Yoshido would have a chance to beat Silvia.
UFC heavyweights just suck.
Dana White is an idiot. Did you hear recently that they failed to sign Quinton Jackson back into the UFC? White is running out of good fighters fast.
Think about it, who are the ELITE fighters in UFC right now? There are very few: Matt Hughes, Georges St. Pierre, BJ Penn, Rich Franklin, Tito Ortiz, and Chuck Liddell. There are only so many permutations of these six guys that you can come up with before fights start getting boring. I mean look at these upcoming fights: Matt Hughes vs. Royce Gracie? gimme a break. Tito vs. Ken Shamrock?!?! Dana White needs to attract a good Pride fighter or two back over to UFC, because god knows that TUF isn't going to produce any elite fighters.