1min block speed would bloat the blockchain and create more orphans, stales. We have 2.5min which was tested for years in LTC. I don't know of any 1min coin that has years of testing.
I think it's not true that 1min is fast enough for waiting in a line when you buy a coffee: with blocks targeted each minute, you have a 1 in 150 chance chance of having to wait more than 5 minutes for a block, this would still be unacceptable for some coffee stores.
Also, with 2.5min, each block requires more work (is more difficult), meaning we will have larger prime numbers sooner.