Mine seems ok considering I ride it to work every day.
About once a week depending on what condition the bikes in, I give it a good clean with Muck off and a hose.
When the weather was at its worst, it didn't get cleaned for about 3 weeks because it was below freezing. I was getting worried because my nice new cans were lucking very sorry along with the rest of the bike. When I eventually washed it the only corrosion damage was the engine paint was getting a bit flakey, but those parts weren't perfect when I bought the bike anyway.
The spokes seem fine, ( this is a 05 model I think, though first registed in Feb 07 ) with the rest of the bike along with my MTC stainless cans.
Perhaps the newer models have more rust issues?
Anyway surely you would think if a bike is UK spec, then it should be able to cope with uk roads etc. Maybe we should all join Kev in Oz.