OK. I believe you. That is new, then. For years, the dealers only sold Denso's. I changed my stockers at 80k and put NGK. 160K now and still going strong.
Finally got around to changing everything since the garage was free today(woman went back to work)... replaced with OEM plugs and NGK blue wires... i believe the wires were original too.. said sumitomo 2001.. mine is an 02
First thing i noticed was only the intake side plugs have been changed
Now check out the difference in the plugs... im assuming they were the original plugs