Google ist not always right. And the ACA500plus has introduced a few things that were thought to be impossible from the external connector before. Yes, it's retro-computing, but no, it's not stuck in the 1980s (in other words: There is development going on, and new ideas are applied).
"better" implies that you've had a "worse" experience so far. What I was trying to explain yesterday was that technical limits have most likely lead to an intentional speed change with the move to a different video mode. So technically, you can't speak of "better" or "worse", because it's just the way the authors have created it. The best words that come to (my) mind are "original" or "un-altered", which probably triggers an "unusual" feeling in you, as it deviates from what you remember hearing as a kid. I have that same feeling when I hear a tune played back on an NTSC machine, because I grew up in Germany, where PAL used to be the norm.
Sorry I should have used better English re: "better" and "worse" experiences. I agree completely with your response here.
What I mean is, the music "beat timing" sounded fast to my ears, but I also realize it might actually be timed correctly. I want to try some different modes (I'll use my A1200 later today) to see if the speed changes vs. my ears to see if it's just me or something else going on. I think you're right but want to know 100% for sure by trying a few things. Perhaps it's just getting older so I'm expecting things to be slower ;-).
And yes ACA500plus is an excellent piece of kit - personally I don't see the need for additional acceleration beyond this on an Amiga 500 - a 42 MHz 68000 with fast ram is quite powerful for the software library.. though it's nice to have options.