Without knowing the actual sales for BF3 on PC this is impossible to discuss. Partial data is not a basis for clear understanding.
Digital sales on PC are now significant and without knowing the digital purchase number it's impossible to say if this failed on PC or not.
Also, I'd note there seems little point seperating platform out. BF3 was built on an engine designed to support PC and next gen as well as this gen (just about). The PC development costs wouldn't have added much to the PS3/360 element at all. So whatever the PC sales are, on top of consoles they are simply adding more revenue/profit (and indeed for digital purchases significantly higher profits) to the overall performance of BF3.
To put it another way - if you're releasing on PS3/360 and for minimal cost can release on PC (and via your own digital channel where presumably all revenue comes straight to you with no cut for anyone else) why wouldn't you?
Try to be reasonable... its easier than you think...
