Cloud based spreadsheets are not trustworthy

[LanceGary]

Abstract from Journal of Statistical Software:

Cloud computing is a relatively new technology that facilitates collaborative creation
and modification of documents over the internet in real time. Here we provide an introduc-
tory assessment of the available statistical functions in three leading cloud spreadsheets
namely Google Spreadsheet, Microsoft Excel Web App, and Zoho Sheet. Our results show
that the developers of cloud-based spreadsheets are not performing basic quality control,
resulting in statistical computations that are misleading and erroneous. Moreover, the
developers do not provide sufficient information regarding the software and the hardware,
which can change at any time without notice. Indeed, rerunning the tests after several
months we obtained different and sometimes worsened results.

http://www.jstatsoft.org/v52/i07/paper