OP is correct, 1/30 s is a good ballpark theoretical lower bound. Assuming travel across the earth surface, light in a vacuum take about 14ms to cross the dist

OP is correct, 1/30 s is a good ballpark theoretical lower bound. Assuming travel across the earth surface, light in a vacuum take about 14ms to cross the distances. Times two for round trip that’s about 1/30 s. Of course we don’t have anywhere near ideal conditions there (at a minimum, light in fiber is already slower, closer to 40ms round trip in that case, and of course network infrastructure adds orders of magnitude), but it’s a good limit.