Well, the Netherlands has both fencing and ticket gates. Though the fencing is maybe a little less than in the UK.
Indeed - wooden fencing on high speed lines. Looked like wood anyway, and certainly not like the aesthetically pleasing security fencing used in the UK.
Spain has security barriers before boarding which involve baggage scanning, similar to airports.
I think this is only on long-distance services, but at main stations (eg Chamartin, Atocha) it can be a pest.
From what I saw the distinguishing feature actually seemed to be gauge (i.e. whether on a high speed line or not) rather than distance per se.
I boarded a long distance intercity service on broad gauge with no security, but got off on standard gauge at a platform behind a security check.