210 is the MAX sustained transfer rate otherwise known as PEAK. Thats the best you will see from the drive. The avg is more indicative of performance which is still very very good at 156mb/s.
The WD's peak is about 180 for comparison and they are usually tuned for random access performance.
The newer Blues and Blacks also are excellent speedy drives and I think the WD Black with 5yr waranty is 90 for 1TB. The Blues and Seagates have 2yr warranties.