If you are talking about the numbers I posted yesterday, that was a race.
However, I am much less than 180. If the scale says 150 I tell kuf I feel fat and she gives me evil looks.
Weight makes a huge difference climbing but it does also make a difference indirectly because your coefficient of aerodynamic drag is affected by your frontal area which is a function of your weight.
And also your position. I ride a size down, with a special short headtube, with a -17 stem and no spacers. I have about 12cm of drop, bend my elbows and have a nearly flat back on the hoods.
Here is an example from October. This was a (low key) time trial, and it was lightly raining so I didn't break out the aero wheels.
Which brings me to equipment. Being that this was a race, I was using my 46mm carbon tubulars.