Yes, with a small caveat. That being that an early reviewer should state whether the copy they are reviewing is a retail release or not. Simple as that. I.E. if it is a broken street date, or a review copy sent out by the publisher prior to street date for review - it is a retail release. Otherwise, it should be stated by the reviewer that it is not a retail release, and further description of what type of build the game is or where it was obtained should be left ambiguous and unanswered. It could then be speculated by the reader that it is either a preview build, beta, or a pirate copy. If the reviewer explicitly states it was obtained by piracy, the review is then subject to deletion as being against the cag's TOS. This leaves the door open for ambiguity/plausible deniability and does not encourage piracy one way or the other.
I see a very stong correlation between this issue and basically the very idea of CAG. Our goal at cag is to inform everyone of the best deal possible, as soon as possible to make informed buying decisions. This can entail getting the pricing early via flyers, looking up in store database, or simply going into a store and reporting, or gossip. The source of the deal info is always the first question asked in a thread, but it usually is stated or accompanied by pics. Sometimes, to protect a deal breaker, the source is left intentionally vague, with some hint as to whether it is simply rumor or hard info.
Speedy posts facts rather than the actual flyers, but the type of his source is known to be early access to the acutal flyers. If an early review is stated to be from a retail release how is this any different?
If your buddy is a manager at gamestore, and tells you that x game and it is going to cost xx.xx with a preorder bonus of xx.xx, and competitor store will have it for sale at xxx price - without providing any proof, how is this any different than reading a review of a nonretail build of a game? The info is still absorbed by the reader with a higher level of skepticism than if the reader saw a hardcopy of his buddy's info. Same with a review of a nonretail copy.
"Those Who Sacrifice Liberty For Security Deserve Neither."
Edit: If I could add a little personal note to the above/disclaimer:
I have legally obtained retail releases of games prior to their street date to try out, and have choose to refrain from posting my impressions of them as my source for the prerelease retail build of the game had asked me to. Under the policy proposed by others whereby a prerealease review posted by a cag must contain pic's of the receipt of a street date being broken, I would not be able to post, if I choose to. See my gamertag.