Jaja, it will probably for the first 12+ months until they ramp up production.
TBH the speed isn't going to be a massive issue. The speed of ram hasn't had a big effect on performance in quite a while, it's really quite negligible. The interesting bit is the density of the chips and how much ram they'll now be able to fit on a stick.
With DDR4 I think you'll be able to get 16GB 32GB on a single stick.