I can't recall seeing anyone saying it's one of the best experiences the industry has had to offer this year, I just saw two guys putting it on their lists of favorite experiences this year. The thing about subjective experiences is that they're subjective, and someone will feel strongly about what others will apathetically brush off. I've myself played plenty of games this year that I don't consider worthwhile experiences to anyone that isn't me or have my set of specific tastes.
Now if we want to talk about the Game of the Year awards as something resembling a objective list of worthwhile experiences to be recognized then that's what the main awards are for. Unlike the personal lists it was created with the input of several people, people that discussed the relative strengths and weaknesses of the different games and what aspects they ultimately considered won out against the competition. The best part of this process is that you'll be able to listen to it in its entirety in the coming days. In all of its semiobjective glory.
Ultimately, I highly doubt Frog Fractions will not end up on any top 10 list that "matters".
I think distinguishing between "Favorite" and "Best" is just splitting hairs. Favorite just means it's best in his opinion, which is obvious. I don't need to be told that these lists are not based on fact, cause duh. But just because it's an opinion doesn't mean it can't be discussed. It's totally fine to like something because you feel strongly about it but if you're going to say "In my opinion this is the ninth best game this year" then you need to give reasons that you felt it earned this place, and I think the justification for giving Frog Fractions so much praise was pretty flimsy.