I'm pretty sure both these statements could be true - dinosaurs could have been taller (due to the cartilage) than believed, but still be lighter than believed due to the miscalculations, which as far as I recall from the distant, dusty past of last semester had something to do with fat reserves, not skeletal anatomy.
In other words, scientists really aren't that dumb.
Also, they're getting a tad concerned about earth's oceanic acidity - any progress on that score?
In other words, scientists really aren't that dumb.