Saying that though, Windows tries to spread threads across all cores I think, so with a BD core, what it should be trying to do is load all the threads onto one core as long as it's not running anywhere near 100%.
I think that overkill load balancing was more of an issue with Windows XP and Vista; 7 is supposed to do more like you suggest. Though looking at my laptop in idle, it's got little spikes in both CPU graphs, so could be wrong
