I don't know about the entropy stuff though I've seen it discussed before and understand it probably does nothing but whatever Crossbreeder did to my phone has helped in the app switching department. Specifically pulling up the stock dialer and Handcent which often would lag for 5(?) seconds or more was a problem that is dramatically reduced. I have also been running v6 and semi-frequent vacuuming prior to Crossbreeder but those have been only somewhat noticeable on my phone - so CB might likely be standing on the shoulders of those scripts but this has, so far, been the best thing to happen to my phone since Tweaked came out.
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