Btw: the 2011 CfP is still open. At the time posting for less than 9 days 15:48:21.
General Speaker Distribution
Let's start with a look at the general distribution of the speakers.
|Speakers per year|
Top 13 - always on
In this case we do not have a simple top 10, but a top 13 list of speakers attending every Devoxx since 2008. The 2011 speakers are not announced until now, so I don't know, if this list will be smaller after that.
Speaking at W-JAX and Devoxx
There are a couple of speakers which can be seen at both. At last for 2010 I did look at them and found the following ones:
Frequent speaker distribution
Ok, now let's look at the general distribution between first-timers, frequent and top speakers.
|Breakdown by years.|
Compared with the W-JAX this is a very low fraction of returning speakers and also a lower fraction of two-timers.
Nearly 70% one-timers
Nearly 70% one-timers and only 13% of top speakers attending every conference since 2008 makes a great mix.
|Complete speaker distribution 2008-2010|
Woohhoow. I did expect similar results as from the W-JAX, but I must say, that you see far more "fresh blood" at the Devoxx. And there is one thing, the numbers don't tell you: The speakers are excellent and well known. Even the ones, speaking on one conference only.
Devoxx 2008 Speakers
Devoxx 2009 Speakers
Devoxx 2010 Speakers