The majority of SVs in the anglo-sphere are gonna say no because they have strong emotional - if not traumatic - experiences with the worst of the worst in the "church of the new advent". There are still good dioceses out there who pray reverently, and, because of the reverence, the parishioners don't really know or care about the doctrinal ambiguities/changes of Vatican II, they just pray and live like their families have for generations, they don't pretend to be experts in everything about canon law/liturgy/theology/culture/politics/running a parish/philosophy/etc. like the modernist and, in some bizarre twist, many traditional Catholics with a keyboard. I should note that these good dioceses are slowly disappearing with increased globalization and digitization.
All that being said, if those NOers are in a state of grace, then yes they will get to heaven. It is much less likely in a place like the USA/Canada/Australia/etc., where parish life will likely kill your faith or the faith of your children (I literally know thousands who've apostatized in Catholic schools). At the same time I know many NO Poles/Filipinos/Tamils who pray the rosary everyday, go to Mass every Sunday and First Friday, observe the First Saturday devotions, wear a brown scapular, etc.
I think the majority of people who doubt the validity of the NO sacraments are having a sensory/emotional reaction. They didn't grow up in NO parishes where everyone took communion on the tongue, and where many even kneeled, and where the priest preached about the four last things, preached about social issues (against sodomite marriage, etc.), where traditional hymns were sung, and where the boy/girl scouts were forced to observe the 12 hours fast and march almost 5k to a 1.5 hour Mass in a forest, etc. etc.
Honestly, if I grew up in one of those American parishes with altar girls, communion in the hand, fag priests, wreckovated churches, and all that other stuff, I'd probably doubt or deny the validity of the NO sacraments. Outside of having horrible/hypocritical parents, there is nothing more psychologically damaging to a child than a bad religion. The worst atheist/liberals I know grew up in the stereotypical Novus Ordo parish. 95% of Novus Ordo parishes have the same effect on people as hypocritical parent(s), the Church teaches one thing (sodomy is bad, etc.) but then you get a fag priest celebrating a secular/effeminate liturgy at your parish. That's asking for trouble.
To sum everything up: I think NO Catholics in valid NO parishes will be saved if they're in a state of grace. The majority of diocese, especially in the anglo-sphere, even if they have validity (doubtful in some cases), serve to kill the faith rather than nurture it, so you will most likely lose the faith attending such places.