Not necessarily. Pascal is an architecture type. It's power efficient.
Its power may (or may not) allow that, but i'd still say that there's a connection that can be made between what you reported and what osiris/lcgeek hinted at.
A Maxwell-based Tegra semi-custom chip has simply less chances of "having a noticeably better CPU than Xbox One" and to "receive ports from current gen consoles with little to no issues", exactly because it's less efficient. We're talking about a handheld device here, efficiency is key to having good performances. Being close to the Xbox One depends mostly on screen resolution and the dock being able to give extra power to the device (by a strong upclock of the components or adding more cores, or both), but of course it's not a given as we have absolutely no idea of how that thing works. But at this point we can safely assume that the loud fan in current devkits was due to the X1 being overclocked to get close to the higher capabilities of the final chip, like we (and Leadbetter) speculated.
Then sure we have no idea or proof of how close this is to Xbox One (and far from the Wii U) in the best possible conditions, and we likely won't have any before it's officially announced, but we have a few hints at least that point in the direction of Pascal allowing better performances than a Maxwell-based chip, instead of simply being used only to lower power consumption.
. While Nvidia is a powerhouse on the desktop GPU scene and has solid endeavours on embedded devices like cars CPU's, they need all the help they can get with their mobile efforts. Any Nintendo hardware is higher profile than their own Shield line.
