With having seen more than 2 dozen adjoining C2 systems from my static C2 exit, I have seen quite a variety of W-space, and thought I would share some observations.
First off, confirming that W-space (at least the lower C1-C3 classes) is getting much more densely populated, I would estimated that 75% of all C2's that have opened from my system were populated by a POS. All but 2 were online and defended.
The interesting bit comes when you scan these "inhabited" system. For example - If you were to land in my system and scan, you would get exactly 3 hits: two WH's (for each of the static exits, one LowSec and one C2) and a Structure (my POS). Meaning, you could tell that I am an active W-space player because I farm out my system faster than it respawns and as such, rely on the recurring adjoining C2 for additional "farming". As such, my system could be considered "empty".
With the respawn rate being so slow, you would expect that any populated/colonized W-space system that had been colonized at least a week ago would/should be "empty", just like my system. However, of the systems I have seen with a POS, most have had plenty of sites available, typically including sleeper sites, ladar, and Grav. This is a curiosity to me. If I am investing in the POS maintenance costs, I need to cover expenses by farming my system.
The last 5 adjoining systems have all had a POS, but none had anyone present/online at the time I evaluated the system for farming. All 5 had multiple Radar/Mag/Ladar/Sleeper sites, to the extent that not once have I had the time to completely clear all of the sites in the adjoining system. Not that I am complaining - if all of these settled systems looked like mine, I would probably be moving out of W-space.
Why would you colonize your W-space system without completely leveraging the available resources?