^He's talking about the staff expansion, which is what the God tiers scale to. I'll be doing a rough calculation here, so if I make mistakes, please point them out.
Jin has barely dodged lightning at close range here:
http://www.webtoons.com/en/action/the-god-of-high-school/ep-132/viewer?title_no=66&episode_no=132 towards the middle. The device is also capable of cloud to ground lightning, which Han Daewi dodged more successfully and is made to mimic Mori's own Kinto-Un, which has also shown cloud to ground lightning.
Using the Lightning dodging calculation for Jin, I get a value of Mach 1100 (1.7*440,000/2) with the average speed of lightning and Mach 250 with the low end speed of lightning (10^5 m/s). For Daewi I get around 2200 m/s and 500 m/s. We'll take that as the low, mid and high ends for this calc (Han with lowest speed of lightning is low end, Jin with average speed of lightning is high end). I'll take reaction times as the time needed to move 1m in any direction, as that involves movement of hands and legs which is what is needed in combat (this part is all guess work, so I may be wrong. A calc group member might know better).
Reaction times would be 2 milliseconds (low end), 0.45 milliseconds (mid-low end), 12 microseconds (mid-high end) and 3 microseconds (high end). These are our timeframes for the time taken for the staff to go from the Moon to the Earth. They might seem extreme, but that is due to the speed difference between the two feats.
Distance is 384,400 km.
Low end = 384,400,000m / 2*10^-3s = 1.92*10^11 m/s = 641 times the SOL (MFTL)
Mid end (low) = 384,400,000m / 4.5*10^-4s = 8.46*10^11 m/s = 2819 times the SOL (MFTL+)
Mid end (high) = 384,400,000m / 12*10^-6s = 3.2*10^13 m/s = 1.1*10^5 times the SOL (MFTL+)
High end = 384,400,000m / 3*10^-6s = 1.3*10^14 m/s = 4.3*10^5 times the SOL (MFTL+)
So even if take the lowest end, the expansion speed is still MFTL and anyone who can react to it have MFTL reaction/combat speed. This includes Jin, The Nine-Tailed Fox, King Uma, Park, Baek and Lee with Charyeok, the Crown Princes and the King.