WD Red drives park their heads like WD Green drives?

I just received my 2nd WD30EFRX from Amazon yesterday and it also came from the factory with the Idle3 timer set for 8 seconds. I used the Wdidle3 tool and set the timer to 300 seconds. I also used the WD Diagnostics Utility to perform an extensive test on the drive and it passed all tests. I plan to put it into my Ultra 4 later today. Both of the drives that I have received with the timer set for 8 seconds were WD part number: WDC WD30EFRX-68EUZN0. I have seem some indications on the web that this 8 seconds may be unique to drives with the 68EUZN0 extension. Not sure how ever since most people do not post the full part number. My 1st WD30EFRX has been running in my Ultra 4 for 1 week now after I set the timer to 300 seconds. I have only had 2 LCC increases since that time and 1 was due to a power cycle. Seems to be working great and running cool/quite.