I'm just bring up a few questions to consider. It is a common misconception that pushing film has to do with speed adjustment (especially with B&W). The question then becomes is the lab perpetuating a misconception for the sake of the customers or do they believe it themselves? It's not necessarily a sign of a bad lab and I'm not saying this should eliminate any lab from consideration, but I would want to discuss the topic with them in order to better understand their perspective on processing especially if I was considering processing b&w film with them. Talk to the lab about their processing philosophy. Get to know how they think, and do a test of their processing.
Basically, don't just take anybody's recommendation of a lab on faith. Don't assume that the lab knows any more about processing than you do. When I took charge of b&w processing for a major lab, the attached processing chart was what they they were using. I've also attached a page from a Kodak lab survey done years ago. Joe's Basement was at one time considered a top lab. Their results are fairly representative of the survey. Kodak gave the labs two rolls each of a number of different film types asking them to process one Normal and one plus two. Normal can be considered to fall somewhere between CI 0.56 to 0.61 and plus 2 between CI 0.75 and 0.85 for a diffusion enlarger and depending on other considerations.
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