Reviewing/Rating On Tap vs Packaged Beers

Is it reasonable?

Of course! The vast majority of beer consumed nationwide is not on tap at a brewery. It's packaged, bottled, canned, on tap elsewhere, etc. This is the beer you are getting, and this is the beer the brewer is presenting to you, the consumer and purchaser of their product.

Now, is it worth noting those subtle differences in your review? Sure! Similarly, if you're reviewing a 75 day old can of a Citra dry-hopped IPA, it may be within freshness, but it's simply not going to taste the same as that exact same beer canned 14 days ago. It's worth noting in your review - but it's also perfectly reasonable to review that beer, as it should be well within freshness guidelines.

I will note age, packaging, draught, etc., if I feel anything may be detrimental to the experience - and if I later have the occasion for a better experience, and I feel it warrants revisiting the review, I may indeed do so (but I don't make a habit of it, as revisiting your reviews is a tricky road). That's pretty rare, but it has happened.

Regardless, if the brewer managed to get their product delivered to me under satisfactory conditions (age, storage, temperature, etc.), then it is 100% reasonable to review that beer and expect it to be representative, at the very least, of the brewer's skill and intent.