I don't think it's too dishonest, it's not like Apple are going to change the colours today and then do a spec bump next week. Disappointing or not, the line has been altered today, and therefore it's unlikely to change again for at least another year (or even 2/3 years in this particular case), so anyone who has been waiting for an update will be suitably informed when they check MR's guide, whether or not they feel that update has been sufficient to warrant a purchase or continue waiting is their own decision. I agree that "buy now" is a little much/misleading for this update (make no mistake, a colour update is still an update), but that's just the way MR set up the guide, it's almost certainly automatic and therefore deserving of being cut a little bit of slack in my book.That's not even the worst part. Look at MacRumor's buyers guide: they're labeled "Buy now - Just updated". It's bad but comprehensible for a Company to lie about its' product. For MacRumors it's just shameful.
[phew that ended up being way longer than expected!]