A car that does not like being under 1900 RPM's is not considered a car with good street manners.
that is a matter of your opinion.... some people might disagree. I for one would tend to agree with you if below 1900 RPM it stalls out all the time... if it is just a matter of a hard lumping idle and poor vacuum from 900-1800 and it stays running, I'd call it streetable.
It may be hard-ER to drive sensibly, but someone might still say it is "streetable"
really it is a subjective opinion.
I call my Mustang very streetable and even took it on Power Tour this year..... my friend Ken calls my Mustang unstreetable and suitable only for the track.
it really is a matter of how much you are willing to put up with.