This is absolutely true- in all my decades of live engineering, the smaller, parlor down to the mini guitars always have less issues. The big acoustic bass guitars like the Takomas are always a nightmare. Can't say I care for the Uke type basses, they can sound good but just a bit too small for me. And the ones with the rubber strings- can't stand them.I do think that, if you want an acoustic bass, you want a mini one - smaller acoustical instruments, while they don't play loudly on their own, tend to do better when amplified in terms of being more resistant to feedback. I've always like mini acoustics when doing FOH - you have a much better chance of getting a good sound when amplified with a mini or concert size guitar than you do with a dreadnought or jumbo.