Yes the Trident did have a good wing, but it wasn't a very big wing. The resultant heavy wing loading made for 'gripper' take offs, high cruise speed, and good turbulence-punching ability.
And didn't they suffer cracks in the wings? Too stiff perhaps?
None of scotbill's post challenges what I said. Which was:
The T1 was stupidly small
The T2 was better but still too small
The T3 was back to the right size - dH 121 size. But it was underpowered and a had a makeshift boost engine cobbled on to try to compensate.
It might have been fun to fly (I've heard different from some who were there), but it was not a 'good' aeroplane for the above reasons, which is why it didn't sell significantly outside BEA.
The 727 was what the industry wanted, and sold very well as a result.
The dH 121 might have been. We'll never know.