There's always one...
The link will get you a PDF factsheet of the F-419/F-419STD from Neovo.
In the factsheet you'll see the response times quoted as 15/10 (R/F).
The R/F means rise and fall.
You said that one of their engineers is quoting these as VGA and D-SUB times. If that's the quality of engineering staff, maybe that's another good reason not to buy one of these models.
www.paysan.co.uk/pages/downloads/F-419.pdf