No I'm not sure about this- because I had never even heard of this method until now! That being said, I had an ultrasound yesterday(abdominal), and baby measured 6 weeks(haven't changed my tickers yet as I haven't been given the new due date).
From what little bit of googling I've done, baby having placenta/ being attached to the right side means boy, left side means girl. Transvag ultrasounds give you an image which is accurate, abdominal gives you an image which is reversed. Since this is the case and I had an abdominal ultrasound, and baby appeared to be attached with placenta on the far right of the image, according to ramzi method, my baby would most likely be a girl(placenta on the left side.)
Honestly I don't give myself that much credit for being able to read ultrasounds accurately, I don't put much faith in this method because I know next to nothing about it, and really all I could look at was that little beating heart. Heh.
Also, because that is a transvag ultrasound(so the sides should be correct), I would guess that baby is according to this method, a boy. Please put no stock in my guess though! If you get a 12 week ultrasound post your nub picture though and I'll give it my best shot- I've yet to be wrong once!*knock on wood*