They seem to be in line and comparable to other post-viral complications, see e.g. https://www.medrxiv.org/content/10.1101/2021.03.12.21253448v... ; prevalence is 13-14%, distribution of specific complaints is somewhat different.

They are definitely real, and can be serious and long term, but they likely aren't novel; I suspect ME/CFS, "long lyme" and a variety of other conditions often dismissed as psychosomatic by practitioners who can't find a test for them - are post viral/post infectious syndromes, and they will be joined by "long covid".

Perhaps some good will come of this - those "long sequelae" diseases will get more and proper attention.

But none of the data I've seen so far about "long covid" puts it out of line with what we've known about post-viral sequalae for ages.