Do you guys remember textured ceilings? They were the "it" thing in the 80s and early 90s. Some were called popcorn ceilings, some looked like they were made by fanning out a trowel in damp plaster, and some were very complicated to make. Anyway, I read in This Old House magazine that textured ceilings lead to better room acoustics. How true is that? How much of a difference are we talking about here?