No sarcasm here. It took me about two weeks to adjust to the movement/speed curve of the TrackPoint. It then took me another two months to reach sufficient proficiency to bypass a mouse and trackpad. I am sure some folks could adapt faster, but I had to surpass 22 years of mouse muscle memory.
My job entails writing emails most of the day, Salesforce, and internal communication tools. I love not having to take my hands of home row. I haven't been able to quantify any speed improvement. But, I feel more focused and in the "zone" more often. Could all be my imagination. It could also be that I find ThinkPad keyboard wonderful to use too.
I do use the Adobe CC Suite for the occasional video, presentation, or mock up. No issue using the trackpoint there either.