My son has CONSISTENTLY been measuring large from the word go. Usually 2 - 4 weeks ahead based on tummy and head measurements with him limb measurements being closer to date. Our US Tech is EXTREMELY thorough and triple checks all measurements, not to mention programs these devices for GE. So... I put a lot of value into what she has to say considering she's on the money 98% of the time. She's a wizard, I swear it.
At his last ultrasound (Christmas Eve at 29 weeks and change, almost 30 weeks) he was estimated at 5lbs 5oz already. Coupled with the fact he's VERY low in my pelvis and I'm in pain... I wish they'd take him a wee bit early. We have another US on Tuesday which will tell us a lot more.
And no... No GD. Passed with flying colors.