I'm not fool enough to believe anecdotal stories with no specifics given.
On the other hand if someone explains a failure with some genuine facts - I pay attention. I don't believe or disbelieve. Just register it into memory and see if I come across more evidence to support the story.
As to a blanket statement like "Stihls are better then Dolmars?" Hardly worth paying attention too. Dolmar is a slightly older saw company than Stihl and makes a lot of pro saws in Europe.
In regard to some logging company quitting Dolmar? Maybe but why? Quality? Prices? Options? Local repair shops? Lots of loggers and firewood people very happy with Dolmars. And yeah - I'm sure many happy with Stihls. To each his own, I guess.
I did not switch to Dolmars because they were better then equivalent Stihl saws. I switched because they were every bit at good but priced less.