I'm in the same situation speech-wise, where often I sound fluent, until I don't (usually due to random anticipation). tbh I get pretty excited when I meet another stutterer, but (I didn't make it clear in my post), the types of reactions I'm referring to are moreso fluent people saying "oh, I do that sometimes too" in a "we all stumble on our words sometimes" way without understanding that I'm disclosing I have an actual speech disorder. inb4 "how do you know they're fluent?" because they're my friends and after clarifying eventually, they'd understand that being tongue-tied and stuttering aren't the same. I just wish there was a smooth, succinct go-to response, because right now I usually say "oh, I meant like... a speech disorder I grew up with. hehe..." and it still comes off too serious.