In my last couple years at RWG1 and RG since its been up,i have removed thousands (literally) of pm's from my inbox,and can say that all of them i can recall have always been polite to me and have always replied to any responce i have given with a 'thank you dave' or the likes...and the 'sorry to bother you dave' type thing when they first send,to which i reply thats its no problem at all....
Not here as i'm not active as much,do more reading here,but i can't see the folks here being any less polite,i have gotten some pm's here and have always gotten a thanks....