Such as wild meant-to-take-your-head-off haymaker round punches?
Punches like that are God's gift to Wing Chun. Having worked for 2 years in an area that I was exposed to violence on a regular basis I can tell you from experience that I would much rather face one of those than a savvy, measured fighter. Not that I have ever been in an altercation with a savvy, measured fighter but I certainly have experienced the furiously angry "me want kill you" type.
Do you believe that the Wing Chun you have been learning will help you defeat someone who is REALLY intent on hurting you? A drunk a$$hole who wants to smack you around? These are the most likely scenarios. It is good to train against a mixture of opponents but realistically how many times are you going to be attacked (if at all?) by a calm, calculating fighter with many years of training?
Good luck with your training,
SB
In combat you sink to the level of your training. You do not rise to the occasion