So I was bumming around on BoLS a little while ago, and I stumbled across this article. This is an aspect of the game that I had never considered before. As primarily a Warhammer player, I've come to understand that games can be won or lost through the art of deployment, and the outcomes of many games (especially fantasy) can be determined just by looking at two fully deployed armies. But using objective placement to throw off my opponent's army never crossed my mind.
Having a shooty marine list, I tend to place objectives toward board edges and in cover, so I can plop a combat squad with a heavy weapon right on them and hold, while my other combat squads rush forward to threaten my enemy. But perhaps it would be more effective to place them in the open. After all, most armies lack in a large amount of AP3 or better weapons, and I could always hide my marines in cover nearby until the end of the game, when they rush out and grab the objective. This would have the double benefit of giving me clear lines of fire to enemy units attempting to snap up objectives, as well as denying cover saves to said enemy units. As most of my opponents are Orks, Tyranids and Daemons, cover saves tend to be vital for them.
Once I switch over to my assault-heavy Blood Angels list (two months!), I definitely like the concept of lots of objectives at the center, as it forces my opponent to advance forward and meet me in open combat.
This is something I'm definitely going to have to consider in future games.