As far as I know, GM was never really directly quoted about Facebook ads, short of being characterized in the original WSJ piece as "deciding that paid ads on t

As far as I know, GM was never really directly quoted about Facebook ads, short of being characterized in the original WSJ piece as "deciding that paid ads on the site have little impact on consumers' car purchases" and "its marketing team began to question the effectiveness of the ads". My impression from following the ad scene is that it's as much about not being able to measure results than the ads being 'completely ineffective'. Big advertisers like GM are used to having robust analytics behind their buys, and Facebook doesn't (currently) let people tie their purchases in to the same technology (read as: tracking) ecosystem as most other display buys everywhere else on the web. Everyone not selling something on a click-and-buy-me basis is still feeling out the effectiveness. Maybe it's good, maybe it's not. But watch that 10M canceled buy become a 100M buy if the tables are turned and Facebook can figure out how to sell folks on the same advertising tracking their exposed to everywhere else.