Hi, the WDC WD10EADS-22M is a GREEN drive designed to save power at the expense of slower performance. Nice write up here: http://www.tomshardware.com/reviews/green-terabyte-1tb,2078-5.html
The drives it's being compare to are all slow drives. This is a nicer slow drive. 5400 rpm.
Download HDTUNE (google it) and run the benchmark.
Fix is (1) buy a faster spinning drive. e.g. WD Black or (2) Buy an SSD at say 240GB and manage space across your current drive and the SSD.