Is extreme programming out of date?

Question

I have stumbled across this graph and I wonder if someone would care to explain the results?

As you can see, extreme programming (XP) is practically uninterested and has almost disappeared from searches.

The legend is:

Blue: Agile
Red: Scrum
Orange: extreme programming
Green: Waterfall

source: http://www.google.com/insights/search/#cat=0-5&q=agile%2Cscrum%2Cextreme%20programming%2Cwaterfall&cmpt=q

Answer 1

• Agile is a very generic word. It can also mean flexible, adaptable, fit.
• Scrum, for most people, refers to something that happens in a game of rugby.
• Extreme programming is probably within allowable error margins. Unless people are programming as they skydive from a plane or something. Ignore this one.
• Waterfall is, for most people, h2o descending from a higher level to a lower level of a riverbed with a significant vertical descent.

It's no wonder that, when I search for these terms, Google immediately warns:

Less than 10% of searches containing your search terms belong to the Computers & Electronics category

Google insights can be very useful, and it's smart enough to guess that I am talking about computers, but it's also smart enough to warn me that the terms I am searching for bear little relevance on a global scale to what I think they do.

You have to be careful how you interpret the results.