I will be happy either way cause I root and ROM, but even with 3.0 the sensation is still only running at 1.2 with dual core. That is not far from the stock speeds of the TB, so running the system shouldn't be an issue. Now single vs. dual yeah dual works less for the same result technically, but it is still running the same speeds and power as the single core.. in theory right? So..
Well, no, actually. Dual core means there are two cores each clocked at 1.2GHz. In theory this would mean that a dual core processor is twice as fast as its single core counterpart. The thing is that CPUs are serial processors meaning they tackle one task at a time. You need software that parses the stream of operations efficiently into two streams and then puts them back together. Since that process in itself takes some processes/time you will never have a perfect parallel processor that is actually twice as powerful. The Motorola Atrix came out with Froyo 2.2 which had no support for dual core. So basically it was a heavy duty processor that took more battery than necessary. With gingerbread that DOES have support for dual core processors it will actually take LESS battery to do operations by virtue of parallel processing and lower required clock speeds (and of course smaller transistor build size as always).
In short: that phone has a LOT more horsepower than this one. Get used to it. In another few months people getting new phones will be scoffing at those with single cores and another few months after that people will be scoffing at dual cores. The TBolt is a great piece of technology and has an incredible practical application for everyday use. It will be "obsolete" very quickly but it will always be an incredibly powerful PDA.
Also: last post on previous page: Sense is actually quite streamlined for what it is. It's a set of widgets, several caked in apps, well polished and ALWAYS smooth animations, as well as an entire platform for homescreens and menus on top of android vanilla. Just goes to show you how far a billion cycles per second on a 45nm (that's roughly an order of magnitude shorter than visible light) transistor build size will take you.