Feet on the floor BG impact

[tedos]

I’m so confused about the apparent delay between the sensor reading and the actual BG. In this thread I raised earlier this year, some people pointed out there is no delay.

Dexcom reading delay

Please help me understand this. So I am of the understanding that the dexcom reading is about 15 to 20 min behind( let’s say 15 mins for this example). Now the novorapid takes 20 mins before it takes effect. So in theory if I take novorapid at 1pm, my insulin takes effect at 1:20pm and given my dexcom is 15 min delayed, i won’t notice a drop in my BG until 1:35pm. Right? But the thing is, I notice a drop in my BG on the dexcom exactly at 1:20pm. Consistently 20 mins after injecting insulin …

And on the surface, this is what I have been seeing because when I inject insulin, it takes exactly 20 minutes on my Dexcom before I see the arrows start trending down. If there was a delay, I would expect to see the arrows trending down 15-20 mins after the initial 20 min wait.

If this was the case, wouldn’t control iq detect a rising BG in pretty much real time?