In my experience, yes.
If a partner wanted only research, they’d ask a secretary to compile the information. A junior lawyer should form a view to present to the partner and in my experience, prepare to be questioned on how they came to that decision. It’s a way for partners to quickly form their own opinion and also a way for you to improve. There’s been a couple of times where I’ve pointed things out to a more senior lawyer – that took some courage at first, but, it went down very well. Especially if I was convinced they’d missed out on something important.