Also, comparing a production level Garmin and Lowrance against a pre-production level Humminbird just isn't a level playing field. Maybe the production level won't have any improvements over the pre-production but I would bet that isn't the case. I would expect initial improvements as well as continuing improvements with future software releases.
Also, I'm not sure where he got the actual Humminbird frequency used as I haven't seen that actually published by Humminbird yet, but, it would make sense for Mega Live to be on the low end of the mega spectrum so that you could run Mega Live and Mega 360 at the same time without significant cross talk... Time will tell.