For the record, I am the OP, but this isn't my blog. I previously linked to the databases on HN, and just saw now that the owner of this blog did some analysis on it.
But I do agree that there seemed to be some faulty entries. This was the case for all of the previous years I looked at.
I was just approved for an H1B for next October, and received a bit more 25% raise after the immigration lawyers had already finished all the paperwork. I highly doubt they refactored it. It's likely that some of these are just estimates, and do not include bonus figures either.
But I do agree that there seemed to be some faulty entries. This was the case for all of the previous years I looked at.