Whatever Flir's attitude (If they even know yet) I highly doubt they'd ever say anything, publically or privately, due to political issues with shareholders etc.. You may get the odd snippet out of a chat with a dealer or someone at an exhibition ( simply looking at their non-verbal reaction when you mention it can often be enough to tell if it is generally known), but rumours like this aren't always reliable.
The timing and content of the next major firmware release (if any) will probably be the best indicator of their attitude. The 19.x release we've seen is probably too early to be a reaction (could be interesting to try thr first service mode hack on it though).
I've not really looked at features of the E8 compared to other units at a similar price, but £4700 seems a lot for a unit with no manual focus, manual temp range selection, wifi, touchscreen etc. even compared to the FLir Ex0 series. I can't see them selling many, and my guess is the long term plan is to cut the price of the higher end models as soon as any competitors reduce prices.
As regards sales volumes it might be interesting to compare serial numbers - maybe if everyone posted their serial no (with the last digit or two omitted if you're paranoid) some rough figures could be inferred from the maximum delta.
My guess is it's well into the thousands PA, maybe 10Ks - they are advertising quite a lot, and the E4, even in factory state, is probably the best unit under $1K in an increasing market.
It would be interesting to see if any of the big TIC dealers have seen any sudden shift in normal sales patterns, though the E series being pretty new and very good as-is would make it hard to discern any causal effect.