No they're not real in any substantive, objective way, it's just an extreme form of oneitis and infatuation on both ends. I have a few positive memories from my two such relationships but overall I view it as fake and fraudulent. You can take some pride in landing these women though as they tend to have high standards for the boyfriend role based on whatever criteria they find important.
However, they are still women after all(just to an extreme level) so its OK to apply lessons you learned with them to future. To what extent though I'm not sure, because I actually considered making a thread about whether it's strategically better to cut the whole experience out of your analysis of women because it's so skewed one way. It may be that the costs outweigh the benefits. That being said, I certainly know there are at least some similarities with more normal women and Cluster B women.