Bush snubs press-corps traditions in briefings.
Bush's slaps at Thomas are consistent with the psy-ops his information wranglers conduct day-in and day-out on the White House press corps. Bush's news conferences have become increasingly scripted, with the president calling on reporters from a preset list and refusing the follow-up questions that might trick him into saying something substantive. Press Secretary Ari Fleischer has lobotomized the White House press corps in official briefings by jawing more and more and saying less and less. (The smarter reporters play hooky these days rather than endure Fleischer obfuscations.)
I wouldn't call that "smarter". I'd call that sheep-like denial over a situation that's gotten out of hand.