Fair enough on the core stuff - my mistake. I don't have time to find the other links I was looking at again, but I do think there are areas where it's well less than 500m in the core.
I'm not seeing the 2.5 km on any of those links in particular though.
This is what I'm seeing.
The Light Rail now link:
23 stations over 14 km in Nottingham
28 stops over 15.8 km in the Traimbaix in Barcelone (connecting university area to suburbs)
Trambesos in Barcelona has 27 stops over 13.5 km
26 km with 47 stops in the new line in Athens...
Other line in athens does have stops over 1 km apart
the UBC link (also be aware this is a pro-Skytrain, anti-LRT site)
Shooting for 400m spacing (2-3 blocks) in the denser area and double that in the less dense area, still under a km.
The Edmonton link
suburban system style: 1000m to 2500m spacing, urban system style 400m to 800 km spacing
Their current system is "suburban style" with more benefits noted for the 'urban style'
Either way, it's still less than how far that 84-year-old had to walk this morning to be on time.