Last night's rebound fest against the Cavs doesn't seem like an aberration but part of a trend. Comparison of rebound diff to last year certainly supports it - Rockets went from +0.3 diff (ranked 14th) last year to +3.7 diff (ranked 6th) this year.
The improvement is on the defensive end - from .758 last year to .830 this year (best in the league), while offensive rebounds regressed from .246 to .219.
Nice trend.