Never confirmed it, but I guess we will all find out, sooner or later.
To the OP, I drink 6-10 Diet sodas a day for 30+ years, went cold turkey on all sodas 11/3/19, I'm getting used to water. I keep a six pack of Diet Dr Pepper in the fridge, to daily test my will power, so far, so good.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.