The usual advice is the use of reputable media, trying not to burn too much in a DVD, ( or use too high a bitrate to encode)
The use of less than maximum burning speeds is to avoid reaching the limits of "error" tolerances with both media and hardware and is not specific to video
While I agree that there is no evidence that burning speed makes a difference, the possibility that a few discs or batch may fall short of QC standards or the hardware may be less than perfect at max burning speeds may make it advisable to use these maximum speeds with care.
Oh.. a decent branded burner will serve you better than a no-name one as their reliability cannot in general be guaranteed
Some Burning software also seem to produce DVDs which have better
compatibility with a wider range of DVD players
Finnally some DVD players ( regardless of make or range: budget, mid range high end) are fussy with recordable DVDs
It is almost impossible to predict whether your DVD which works well on your setup and computers will play flawlessly on somebody else's DVD player. This applies to even DVDs burnt off a Settop DVD recorder
AFAIK there is no specific problem identified with burning in Pinnacle Studio or with Nero
PS:
I've seen your other post re labels / DVDs in transit via Royal mail.
I have a friend who does videos weddings, birthdays for a living and sometimes he gets similar problems. I then copy his DVDs using DVD Decrypter, DVD Shrink on the PC, or my LG settop DVD recorder and eventually invariably end up with producing compatible copies that can be then be played with ease by his clients.
The main advice I give him is to stick to good branded media ( he likes trying "cheapos" occasionally) and to stop trying to fill the discs with too much material ( he gets lazy editing sometimes as well).
But
Even when he heeds my advice , he still gets occasional "returns"

.
The last one played on DVD player in the kids room but not the clients main living room one connected to the 42" plasma . It still got rejected as they stated that main viewing was to be in the living room
It poses a dilemma when you cant tell a client the compatibility issue lies with their player and not your work