I live in AZ too! Peoria to be more precise. Hehehe...
Got the thermostat set to 80 Fahrenheit, and this CF HD 7850 system seems to work fine here. Just giving a reference...
Anyway, I don't think you can blame Tom's here. I'm not sure how other sites get multiple manufacturer card so quickly, and I'm not sure how they test all of them (specifics and criteria), but maybe Tom's doesn't get that many samples from different manufacturers, doesn't have the ability to acquire (buy) them immediately, and/or can't test them to the extent they'd want to, immediately, due to many possible reasons.
This article though interests me and probably others. That may be because I'm not using it as a buying guide for now (though it could be) but as a new reference and a leisure read.
Knowing the reference model's:
MSRP,
architecture/chip design (e.g. GK106) and how it works,
performance (and I want to point out blaz's point about how overclocking doesn't necessarily scale up performance linearly),
general overclocking capabilities (though I'm not sure they put that in this review),
its different operating temperatures, power draws, and acoustic levels (though this varies a lot as a lot of us know, with manufacturer specific coolers (not to mention aftermarket coolers), chip binning (possibly), etc.),
and any other details
makes me a happy reader.
It sounds really difficult to test all different manufacturer takes on this reference model, even more so when you consider that some manufacturers may have more than one model of their own based on this reference model. Also, not to mention aftermarket coolers.
Again, Tom's may come up with an article comparing common (?) models based on one reference model, but that itself may not be perfect, and, again, that may take some time on their part because of multiple possible reasons.
The reader of the article should be aware that this is just a reference model-based article, and should use other sources (other articles from here and other websites), data (product reviews, and manufacturer support and reputation as examples). and plainly their own discretion.
I want to thank you for being nice. It is great to see more people like you and not unsavory people who have to be so offensive and sometimes personal.