Yes, he's in that ballpark with a win ratio of 41.74%:-
http://en.wikipedia.org/wiki/David_Moyes
Dalglish is already upto 49.18% after twelve months:-
http://en.wikipedia.org/wiki/Kenny_Dalglish
Perhaps some Evertonian's would put that down to the fact that Kenny has had more cash, ignoring the fact that this is due to the club being run better financially.
Kenny's trophy haul just with us.
As a player...
Football League First Division: 197879, 197980, 198182, 198283, 198384, 198586, (player manager)
FA Cup: 198586 (player manager)
Football League Cup: 198081, 198182, 198283, 198384
European Cup: 197778, 198081, 198384
As a manager..
Football League First Division: 198586, (player manager) 198788, 198990
FA Cup: 198586, (player manager) 198889
Football League Cup: 201112