Setting off slow

[NH1]

I'm sure I will get flamed for venturing into this section but I have a genuine question. I'm sure it never used to be this bad years ago but when trucks set off from traffic lights they have barely got the arse end of the trailer through the junction before the lights are red again, obviously this is even worse if its on a slight incline.

Its almost as if the driver has put it into second? the instant the wheels have started rolling, it is anoying if you are stuck behind one.

Are they underpowered compared to what they used to be, are the drivers under instruction to take it easy and save fuel or are they simply overloaded nowadays?