Do not have opportunity to try more vendors. My friend has some old LiteOn 5001. I tried couple +R medias with this drive and all worked perfect. Unfortunatelly didn't focused on detection time, I will next time. Good tip 8T8.
It takes some seconds in 165H. This drive makes usually 3 to 5 attempts to detect the media. DVD+R from A07 get detected at 1st attempt as well as DVD-R from 1620.
I already sold Pioneer, so cannot try.
I am sure this 516 has ability to read both formats as DVD+R burned from Pio A07 are perfect detectable and readable.
Well yes, if the drive needs more than one attempt to detect some media, we can say it has problems with recognizing them. Fact that +R medias of the same vendor from different burner works fine lead me to suspect my BenQ...
8T8 if you have some extra time, please try some DVD+R burned from 1620 in your 165H and focuse on how many attempts it needs to identify the media.