theodp writes "On the final day of Computer Science Education Week, the Hour of Code bravado continues. Around 12:30 a.m. Sunday (ET), Code.org was boasting that in just 6 days, students of its tutorials have "written" more than 10x the number of lines of code in Microsoft Windows. "Students of the Code.org tutorials have written 507,152,775 lines of code. Is this a lot? By comparison, the Microsoft Windows operating system has roughly 50 million lines of code." Code.org adds, "In total, 15,481,846 students have participated in the Hour of Code. Of this group, 6,872,757 of them used the tutorials by Code.org, and within the Code.org tutorial, they've written 507,152,775 lines of code." On YouTube, however, a playlist of the Code.org tutorial videos has distinctly lower numbers, with only 2,246 views of the Code.org Wrap Up video reported as of this writing. So, any thoughts on why the big disconnect, and how close the stats might reflect reality? Code.org does explain that an 'Hour of Code' is not necessarily an 'hour of code' ("Not everybody finishes an Hour of Code tutorial. Some students spend one hour. Some spend 10 minutes. Some spend days. Instead of counting how many students 'finish one hour'; or how much time they spent, this [LOC] is our simplest measure of progress"). So, with millions being spent on efforts to get Code.org into the nation's schools — New York and Chicago have already committed their 1.5 million K-12 students — is it important to get a better understanding of what the Hour of Code usage stats actually represent — and what their limitations might be — and not just accept as gospel reports like AllThingsD's 15 Million Students Learned to Program This Week, Thanks to Hour of Code ("every other school family in the U.S. has a child that has done the Hour of Code")?"