This is the post that concerned me and got me on Brainstorm to test this.
RM/ENA/MU Scrapper
I'm not getting wild ST variations with my times. My worst run was an 8% difference from my average on live. My best run was 0.9% difference. Admittedly I haven't timed normal mission stuff but I haven't had anything pop out to me.
I'm personally not seeing the gloom and doom regarding it so far so I suppose back to running more tests to see.