Well, I don't think we can blame it all on the shotclock, but it definitely favored the hawks.
The Celtics are a slow-down execution offense. The Hawks try to play by the "7 seconds or less" rule to score... so who would be more hurt by no knowledge of the shot clock?
Also, it's pretty easy for the home crowd to completely drown out the PA announcer on the Cs possession's so they have no idea how much time is left, then be quiet when the Hawk's have the ball.
And of course, having one (or two) men who are employees of one team in charge of something like this just fuels the fire of conspiracy theorists. Personally, I don't think it was intentional, but this is the *3rd* time this year ATL has had problems with their shot clocks. That's unacceptably negligent. Sorry, if you want to make money in this league off your arena you have to keep it up to certain standards.
What really made me mad in game 3 was that they are having something fairly important handled entirely over the PA system, but they still didn't stop the canned "De-Fense" chants, or blaring music in the background.
Did it cost the Cs the game? I don't know, but I doubt it. Did it gave the Hawks an unfair advantage? I believe so.