Earlier quoted context omitted.
I haven't read it, but if it's written in the first person with the narrator referring to themself as 'YT', then it's at least consistent? If yours truly suddenly referred to my mother, or indeed if I referred to yours truly's mother, that would be more jarring I think?
WTF, why chime in without any additional research if you haven’t read it in the first place? No, it’s an omniscient third person narrator. Yeah, YT is probably the “true” viewpoint, esp if you take diamond age into account. “Chiseled spam” and all that.
Third-person narration that refers to the narrator themself as 'yours truly' seems contradictory to me.