Fair enough. I agree that experience teaches better than just reading guides, but I stand by my point: it's unrealistic to expect random strangers to invest the same time in teaching you that a guild would. The guild is investing time in you, for which they hope to be rewarded with another competent team mate. Random strangers know they will probably never see you again, so there's little chance of their investment paying any dividends.
As for pugs requiring item levels unobtainable by the masses... All most pug leaders care about is filling their group in a reasonable amount of time with players who can easily clear the content. That's all. Requirements are a vector of supply and demand. If they can fill in 5 or 10 minutes with 930+, they will ask for 930+. When it becomes easy to fill with 950+, they will ask for 950. Has absolutely nothing to do with what's needed; it's all about what's readily available.