no, longer skis make landing tricks way easier. my 1260s (164) are so much harder to land with than my 175 TMs were. besides, 1260s arnt at all heavy. besides, if he wanted to still be able to use them all mountain, longer would be helpful. also, longer skis have less sidecut than smaller ones, and are therefor more stable, again, a trait that lends itself well to learning. the +'s from the length far outweigh the very, very small increased gain in weight.
with a pair of 175 tms (pretty heavy ski)and a 164 1260 (very light ski), i could still easily spin 360s off the snow. and in the air, the 175s were way more stable. i am not suggesting going heavier, but the longer the ski will definatly work better. the go shorter with twin tips is a fad that i bought into with my first pair of twins. this is just BS left over from the skiboarding days. the truth is, you probably want to go at least head height for an all around park ski. i 180 ski will actually ski more like a 160 regular ski. they both have the same length effective edge. trust me kid, a longer ski is the way to go, especially if its a light ski like the 1260s.
opps, that was free advertising.