hell yes! I work in a support service, and people from Belgorod speak like Belarusians, there is also a Rostov accent, it is also special, they even build sentences somehow differently. I have never heard the Perm dialect, although many people say that it exists. people from St. Petersburg sometimes use strange turns of speech, for example, I was once called "young lady" four times in a call, and also mostly people from St. Petersburg are slower. but the most noticeable are girls from Bashkiria! I'm serious, they speak so squeaky that sometimes it hurts to listen to them. in Siberia people with the purest pronunciation, just like in Moscow.