That was one main result, yes. It looks like Armstrong and Sotala counted the Michie survey as one ‘prediction’ (see their dataset here). They have only a small number of other early predictions, so it is easy for that to make a big difference.
The image I linked is the dataset they used, with some modifications made by Paul Christiano and I (explained at more length here along with the new dataset for download). e.g. we took out duplications, and some things which seemed to have been sampled in a biased fashion (such that only early predictions would be recorded). We took out the Michie set altogether—our graph is now of public statements, not survey data.
That was one main result, yes. It looks like Armstrong and Sotala counted the Michie survey as one ‘prediction’ (see their dataset here). They have only a small number of other early predictions, so it is easy for that to make a big difference.
The image I linked is the dataset they used, with some modifications made by Paul Christiano and I (explained at more length here along with the new dataset for download). e.g. we took out duplications, and some things which seemed to have been sampled in a biased fashion (such that only early predictions would be recorded). We took out the Michie set altogether—our graph is now of public statements, not survey data.