Death to quantization! 
I’ve been on a bit of a jazz kick lately. This post is very “timely”. 
I think not. 30 milliseconds is too little to make a distinction. Consider that sound travels about a foot per millisecond. If I’m playing with my band, and I’m ten feet away from my amp, that’s already 10 milliseconds. Others in the band will already be farther than that. If they’re following me, and I’m hearing them back, 30 milliseconds is easily explainable. Certainly across an orchestra, it’s much more.
When they go back and analyze those old recordings from the 40’s and 50’s, none of the performers would have been wearing headphones, so acoustic delays between instruments would have been real.
I say swing is coming from adjusting the length of the triplet much more than that, and varying it as it is played, sometimes down to where it sounds like a quarter note instead of a dotted eighth. And good jazz guys are always varying it. Joshua Redman is a master at it.
Nothing to do with scientists.