Being a game which is considered "good" by critics is not necessarily the same thing as being a good game or a game with wide appeal.
In general game reviewers represent a very narrow demographic and their tastes reflect this; you're probably not going to see many puzzle games on reviewers' game of the year lists. The unfortunate thing is that many/most gamers do not share their tastes and (in particular on portable systems) favour games which reviewers generally dislike.
The PSP and PS3 have much larger libraries of games which appeal to the same demographic as reviewers whereas the Wii and DS have larger libraries of games which appeal to casual or non-gamers; sales demonstrate that the Wii and DS games have a wider appeal inspite of not being as well reviewed.
