There was a lot of discussion about that chart on my G+ feed. Apparently it's believed to be one day of data based on web activity, but I've read the original report here:
BlackBerry Gaining Share In Key Markets As Market Awaits Q1 Results - Seeking Alpha and I don't see any mention of methodology, etc. so I'm not clear on where they got that from. The author is definitely pro-blackberry, in that he's excited for the news, but doesn't seem to be making information up; although as he's a writer and not the creator of the reports, it is of course possible that he stumbled upon the charts and misinterpreted them. At this point its close to impossible to know if it's correct or not.