Steven-
My suggested statement is "my" general statement; in my reviews, I then list the specifics that I think are significant. As a reviewer, I find inconsistencies or errors to be in two classes: Trivial and Non-Trivial:
The trivial ones could be typo's, the wrong specific zoning description (as long as the zoning itself is correct and the subject's conformity or lack of is correctly indicated), perhaps a date on the comp (1996 vs. 2006, when everything else matches with my 2006 data), etc. A trivial item or even a number of trivial items may have no impact on the overall credibility of the report. Some, while trivial to me, may be significant to the lender; the appraiser's correct license expiration date, for example, when I've already verified the license is current and valid. As a rule, these are not "significant", although I may list them for my client's benefit. When I do, I state that I do not consider these items "significant".
If enough trivial issues are present, I may begin to question the quality of the report. A sloppily written report detracts from its quality and credibility, which I am charged with forming an opinion about. If this is the case, I do consider this significant, and again, state my reasons. However, the value may still be supported in the market. This is an example of a report that "hit" a reasonable value but is so poorly presented, one has to question the competence of its reporting, if not development process. We read about these instances all the time.
A non-trivial issue is one that I find significant to the credibility and usually value of the original report. These can be when comps are provided, a general "these are the best comps" statement included, yet I find what appear to be more proximate, more recent, and/or more similar sales. Or, when a subject is a 2br home, all comps exceed 2br in configuration, and there is no explanation about market acceptance of 2br homes or the appropriate market adjustment between the two (the buyer pool for a 2br home is typically different, and smaller in my market than that for the 3br home).