Okay, so then why did Oakland say they cut DeAngelo BECAUSE his man to man skills were horrible? In addition, he was the #2 CB and was not required to take on the #1 WR very often. If you look at the AFC West, their #2 WR's are some of the weakest in football. What gives?
Hall was supposed to form one of the top cornerback duos in the league with Nnamdi Asomugha, but struggled from the start of the season as he adjusted to the Raiders' man-to-man defense.
In his eight games in Oakland, Hall was beaten 40 times for 552 yards on 66 passes thrown his way, according to data compiled by STATS LLC. He gave up more yards than any defender this season and was tied for third worst in catches allowed.

Hall said earlier this season it took him time to get used to Oakland's man-to-man style of defense after being able to freelance frequently while playing zone with the Falcons.

Washington's proximity to his home town, the team's system (a press-man coverage system in which corners are put in position to make plays on the ball with great regularity) and the Redskins' 6-3 record all helped sway him
So I think we should hesitate before claiming hall our new #1 CB, even though he is being paid like one.