Regarding SLRs are more suitable or not it doesn't really matter, the point is u gotta get a nice Street/Candid pic regardless of wat type of camera u are using...

Malaysia have bunch of Street/Candid photogs... Chot Touch is one of the founder of Street/Candid shooters and he is only using 50mm f1.8 and UWA lens and yet, he produce lotsa awesome Street/Candid shots... And he did sell T-Shirts with words like "Street Candid Is Not A Crime"

I think we can learn from him... Lol...