Another thing to consider is the amount of techincal problems. This is just my experience, but Ive found that there are more bugs that accompany a pc version of a multiplatform game, whether its with finding servers, connection/network problems etc. those type of things. Take Crysis 2 for example, from what I heard, the console release went smoothly, but for pc, I couldnt play single player or multiplayer for the first day because of the bugs. And again, this is only what I see for multiplatform, not exclusives.
This is because most developers are idiots who fail to code their game right or make a poor port from console right away.
Activision refused to add a server-browser to MW2, but fans made one on their own. Also proper server-administration-tools.
Afaik the Crysis Warhead mutliplayer is perfectly fine, opposed to Crysis 2. But that wasn't mutliplatform, of course.
TF2 is the counterdraft to your example, I think. Works a lot better on PC than on console.