LoL,i am not surprised at all.It is just a random comment.
Yes,Seriously.
In MAL,Clannad AS is the top drama,romance anime(Gintama,Fullmetal and Steins Gate are not drama,romance oriented)and Anohana is the No-2 bcoz there is no drama,romance anime between clannad and Anohana(not counting Movie and OVA).So,it is not exaggerating at all.
And
Well.everyone has different taste.So,i am not saying u are wrong.
If one say that Clannad is the best romance drama,Then Anohana is the best friendship drama ever existed.