TL;DR > Pull an "Apple" and make the default setup Time Zone the same as your companies Time Zone - AUSTIN, TX.
Whenever I setup or reset an Icon, the first few clicks of the remote are simple and quick... until I get to the screen where I need to choose a timezone, in which case, because the remote-to-Icon interface does not "scroll" when the UP button is held, I must now click the UP button 37,000 times to get all the way up to the US Time Zones I need to select, which takes the better part of three hours to complete.
Now, I am willing to bet (because I don't know the statistics) that US sales are the highest out of all the countries? And that Greenwich (no, not Connecticut... England) has paid LifeSize a large sum of money to be the "Featured Time Zone of the LifeSize Icon Series"? I'm only kidding, I understand the decision to make Greenwich Mean Time the default was probably a quick thought-turned-solution in the light of greater programming mountains to climb when designing the Icon series.
That said, since LifeSize is based out of Austin, TX, U.S.A, and there is (coincidentally?) a Time Zone for Austin, TX, U.S.A., why not make Austin, TX the default, and let all other choices be scrolled to by the end-users not as graced with the proximity to LifeSize HQ? Apple did it...