Never heard of it. I did check out the sites they have links to...
Could be legit, but I don't put much weight into it. I mean, it's a plausible scenario I'm sure, but I don't think they have any real inside information. The fact that they delve into numbers immediately turns me off. Dates are one thing, but the places claiming numbers (subtracting years, number of days cine) 'tell' them something are generally way off base.
cine = since
Yes, noted that too. But the thing I also noticed was that the site appeared to maintain a long list of jihadi chat sites.