Code:
MPEG2Source("D:\test.d2v").Yadif(mode=0,order=1).Crop(8,4,-8,-4).LanczosResize(624,352)
vs
MPGSource("D:\test.dgm", deinterlace=1).Crop(8,4,-8,-4).LanczosResize(624,352)
XviD 1-pass: 78-79fps vs 100-105fps (C2D E6600 + 9600GT)
I hope I used right Yadif settings.