Super/Ultra Capacitor Update??

If you believe the skeptics of EEstor, the reason your Google searches are turning up next to nothing is because they have nothing. An alternate answer is that the lack of news of EEstor is because late last year they ramped up their sealth mode to avoid tipping their hand to the competitors you mention, and that we may be in the calm before the revolution. It's one or the other, nothing or everything. Only time will tell.

The causes of the delay...procrastination

You'd be talking about an electric car which went 300 miles at highway speeds and then took five minutes to recharge. Let me know if you ever hear anything more...

Not on household circuits designed the way they are today. That much juice in 5 minutes would make fire departments a great investment.

Maybe, but every little Ma/Pa store in the land could have their own recharge plugins and charge for it. That would make oil companies and gas stations pretty rare after about ten years.