Really like the 2.3s for the mountains. Just rode them for 2 weeks in Tenerife. First trip to the high mountains after crashing in Granada, where I *f##k* up after I massive gust turned my handlebars on the descent.
This obviously hit my confidence pretty hard, and Tenerife being known for being windy af, I was a little nervous.
Saying "the 2.3s climb well" is a little pointless of a statement, imo. They are super mega light, and the modern internal width allows for wide tires to role quickly. Obviously they climb fairly well. However, most climbs in Tenerife are 5 to 6.5% average, where a more aero wheel, like the 3.4 for example, is probably faster.
The only bigger climb in Tenerife, that is so steep, that you'd only go light (Masca Climb, 10.9% for 4km), is probably the perfect playground for these. Not only is it f'in steep, it's also unsteady, so you accelerate and decelerate several times.
With that said,the climb came 90k deep into a 120k/3000m+ ride for me, so I can't really say I enjoyed it too much
Edit: I kinda forget to get back to the point I was trying to make.
I really loved riding these wheels despite them not being the scientifically fastest on most of those climbs, for the stability, even in bad, gusty winds. They are mega light and super stable in the wind (which isn't super surprising for the low profile), and that's why I think they are amazing for riding in the mountains.