Yes, the Fathers, Doctors, and Scholastic Theologians are clear on this. While they don't enjoy the Beatific Vision, they enjoy a happiness greater than any that can be experienced by us in this world but this is not the perfect happiness that the Saints enjoy. In Matthew 26:24 our Lord says "The Son of man indeed goeth, as it is written of him: but woe to that man by whom the Son of man shall be betrayed: it were better for him, if that man had not been born." Our Lord does not say "it were better for him, if that man had not been conceived." Because the Beatific Vision is an infinite good, it is still infinitely greater that one is given the chance to attain it rather than not to have a chance at all, but how many poor sinners destined to suffer the eternal torments of hell would gladly trade their place for one of these unbaptized infants?