Ok, I just picked up this issue this morning and yes everyting this guy was saying is correct, plus im gonna add some more direct quotes and some clarification on the ones he listed from the article, so lets begin...
"So, what should you expect? Less dying, for one: The Team is adding a Halo-style health system, whereby avoiding fire will give you time to heal, meaning you'll ultimately spend less time picking "Retry Mission" from a menu screen."
"Ubisoft has brought the new game back in-house at Rainbow Six 3's original studio in Montreeal and has thrown a team of 150 people at the title, wich has been in development since 2004."
"Gameplay will be very cat-and-mouse, kills will not come easy."
"Blind fire and "no look" suppressing fire will be important components as well; the action switches to a third-person, over-the-shoulder camera during these moments, much like in 360 launch title Perfect Dark Zero."
"As mentioned before, the game is also no longer limited to solid ground. With so much of Las Vegas towering some 80 stories above street level, the city provides countless opportunities to scale up and rappel down buildings. Standard rappelling, fast roping (quickly sliding down a rope, slowing the fall with only clenched hands), and inverted rappelling (also known as Australian rappelling)"