Going by the curious and sometimes perverse numerical critical rating system of Rotten Tomatoes, M. Night Shyamalan‘s The Last Airbender is the lowest-ranked major release of the year so far. Hoi polloi critics have given it an average of 5% and the elite have given a 7% rating for an average of 6%.

A film’s ratings can be mixed/so-so (60% to 75%), mixed shit (40% to 60%), shit (20% to 40%) and steaming piles (under 20%). At least 11 other major releases this year have been generally condemned as time-wasters, but Airbender, so far, is the King of Shit Mountain.

Robert Luketic‘s Killers actually has the same negative average as Airbender — a 12% Average Joe negative mixed with an elite zero rating. But after re-reading the reviews for this Lionsgate release alongside this morning’s Airbender notices, it seems as if the emotional/aesthetic energy directed at Airbender is more impassioned, in part because it has a tragic element in that it sounds the latest gong in the damaged career of the once-admired M. Night Shyamalan.

Jonah Hex is the third worst-rated, if you will, with a 9% average — 12% general, 7% creme de la creme.

Battling it out for fourth and fifth positions are Marmaduke and Grown-Ups. The former has a 10.5% average — 10% general, 11% elite — while Dennis Dugan‘s “comedy” has the same rating with a 10% general and an 11% elite. Sex and the City 2 is currently in sixth place with 12.5 average — a 16 general and 9% elite. Taylor Hackford‘s just-opened Love Ranch is seventh with a 17% general and a 15% creme de la creme for a 16 average.

Occupying the eighth- and ninth-place slots are Clash of the Titans and Prince of Persia, which are tied with 31% each. Clash has a general rating of 30 vs. an elite score of 32. Persia has a 37 general and 25 pick-of-the-pack.

Joe Carnahan‘s A-Team stunk in my book, but its average score of 48 — 49% general, 47% creme — makes it seem almost regal in this particular company. James Mangold‘s Knight and Day is the eleventh worst big-time release of 2010 with a 53% general and a 51% elite for a 52 average. And the twelfth-rated among the major-league disappointments is Eclipse with a 58 average — a 52% hoi polloi and a 64% elite.