I have walked many V8's, but you need to know which ones are capable of what.
for instance 94-98 mustang GT = easy kill for most wrx's
99-04 mustang GT = pretty good run, but if you have any mods like stageII you are going to walk him
LT1 = usually an easy kill
Basically the only V8's you need to be consistantly weary of are LS1's and the 4.6blown cobra. It is all relative though because of how well they take to mods.
As for V8 owners thinking wrx/evo/sti are slow.. I guess it depends who you meet. I know V8 guys who utterly stupid and think that STi's are slow as balls because "it is still a 4 cylinder" while he drives around a 210whp mustang
Some people are just ignorant, or are in denial of the truth. In the same sense though, some of the guys that I know that give the STi/Evo the biggest props and respect drive 12sec LS1's and vettes, cobra's, etc.. I suppose it is all about the mentality of the person, some just dont understand that in today's day and age, technology does a pretty damn good job of making for lack of displacement.