While AFFO (a non-GAAP measure) may be inflated, it hasn't grown faster than the relevant GAAP measures. In fact, net income has almost doubled since 2021 while AFFO has only grown 23%. Revenue growth has been 23% as well.
None of this is wildly inconsistent. The only thing that really stands out is the sudden drop in maintenance CapEx in 2015.
They do highlight some other things about the data center market that may be relevant to the share price, but this seems far less damning than the AFFO issue.