The reception Portland's crowd gave the Dance Theatre of Harlem was epic, with ovations at every pause and a clamoring to applaud on their feet before each intermission in the Arlene Schnitzer Concert Hall Tuesday, the first of a two-night run. The youthful faces of the DTH dancers belie their many years of rigorous training, and I would have liked to see this group perform work as radical and genre-challenging for today's audience as Arthur Mitchell's first company performances were in the 1970s.