Educated Poles by and large speak the standard literary Polish, however, at times traces of local dialectic expressions and/or pronunciaton may be detected,
Similar with English language in just one country, dialects are in every language and it has nothing to do with the level of education.
czeba, czy (trzy)
If you learn Polish a good teacher will tell you, you can't pronounce "trzeba" as "t-rzeba" it sounds "czeba" because "trz" correctly should be pronounce like "cz". Separating "t" and trying to say it (in this case, especialy when "t" is followed by "rz") will make word sounds unnatural. That's how it is and works.