atv rider, dirtwheels etc. are totally biased magazines. reviews are based on who drops the most money on advertising.
for example: notice that kenda and maxxis were given pretty good reviews, with the nod towards maxxis.. ohtsu was given a pretty weak review. i would be willing to bet that in terms of advertising dollars it goes, maxxis - kenda - ohtsu.
and if you notice, atv rider doesnt totally write any of them off. this is because advertising in a magazine that gives your tires a bad review doesnt make sense.