The blogger who suggested this hypothesis a few months ago has a new post, with a stylometric analysis of the writings of some cryptocurrency people:
http://likeinamirror.wordpress.com/2014/03/11/occams-razor-w...
(a smaller score mean a closer match. Not sure what scores stand for precisely).
Word length distribution
Diff Nick Szabo / Bitcoin: 0.160
Diff Wei Dai / Bitcoin: 0.241
Diff David Chaum / Bitcoin: 0.257
Diff Adam Back / Bitcoin: 0.337
Diff Hal Finney / Bitcoin: 0.510
Diff Nick Szabo / Bitcoin: 0.191
Diff Wei Dai / Bitcoin: 0.208
Diff David Chaum / Bitcoin: 0.228
Diff Hal Finney / Bitcoin: 0.284
Diff Adam Back / Bitcoin: 0.342