Burning DVD+RW's at 1x?

I’m burning Sony DVD+RW’s with my Benq 1610 burner using Roxio 6 and only getting speeds of 1x (2x at the most), while I should be getting 4x. Is this normal? Anything I can do to speed things up?

Are you using RicohJpn W11 4X media sold under the Sony? May need to update the firmware of the burner.