I don't think the comment you are responding to means "the speeds at which it will stall are lower compared to earlier 737 variations," but rather "at low speeds, it has a greater chance of stalling compared to earlier 737 variations."
It doesn't matter which of those two the poster meant; they're both wrong as descriptions of the effect of the new engines on the 737 MAX. See my other post upthread.
I think you may have misread something. Normally stalling at a lower speed is a good thing.