exynos quad tends to peak all 4cores at max frequency on even just loading web pages.
But, when they said the same exact thing this year, they promise they mean it this time.
This isn't Exynos Quad and it isn't like any other design currently on the market so comparisons are useless. Krait 300/400 are both evolutions of existing ARM design that Qualcomm's licensed and then tweaked. Everyone keeps talking about the "S-800." The majority of performance/efficiency improvement between Krait 300/400 (S-600/800) has nothing to do with design and everything to do with using a 28nm HK-MG (High-K + Metal Gate) die which is also being used by Octa.
The development of big.LITTLE has nothing to do with Samsung/Exynos. It's a revolutionary new approach to combining power and efficiency that's 100% designed, tested, and implemented by ARM (the same company whose designs Krait are based on) and has been in R&D for over two years. Samsung's nothing more than a licensee. I guess Samsung could screw up the implementation of big.LITTLE but their working with ARM directly on Octa so that seems unlikely. Delays trying to balance heat, battery life, and performance are probably likely. If the SGS4 isn't using Octa we'll know something's up in its development or tuning.
The biggest difference between ARM's current designs and big.LITTLE is the move away from asynchronous core management to synchronous.
This explains it.
"Asynchronous clock architecture is a design for multi-core processors, in which, each core is operated at different voltage levels and clock frequencies. As stated earlier, such a design schedules computationally intensive tasks for the faster core, while less demanding tasks for the slower core. Asynchronous clock architecture can thus be considered as one of the techniques to strike an optimum balance between performance and power consumption in multi-core processor based systems.
In contrast, synchronous clock architecture implements a CPU with separate cores, with each core running at the same, fixed values of voltages and frequencies. Processors based on the big.LITTLE architecture adopt the synchronous clock architecture. "
Here's a PDF explaining the technical details of big.LITTLE and why it's so different from current designs. Those of you that are more technical will find it an interesting read. After reading it a lot of doubt about what ARM is trying to accomplish and why will be dispelled.
And none of this takes away from the fact that the S-600 is a brilliant SoC that will serve users of it well.