Firstly not an expert and I'd wait for some other ideas before taking out your turbo.
Do the turbos have adjusting veins? If so they may stick and not be at the right angle for accelerating but instead for higher speeds. This could also explain the smoke if your turbo is not getting enough air in the cylinders.
Id get some EGR cleaner.
I had flat spots accelerating in 1st and 2nd but sprayed some Wynns EGR3 cleaner into the intake and gave it some revs and sooooo much black Shizzle poured out the back.
Now it runs better than ever
I agree with Shrek81, turbo lag! Just make sure you're above 1800 rpm if you want to put your foot down after slowing down.
Under normal driving you should only notice the smoke at night when another car has its lights behind you, your rear view mirror has tinted and you have stepped on the peddle.
If you're under the boost level and you've stepped on the peddle it will smoke until the the turbo catches up with your right foot and in most cases the turbulence behind the car would have cleared the smoke during daylight.
It's one give away when a diesel in front of you has stepped on the peddle and there is no boost!