Something that will help the guys troubleshoot this: some details with the posts. I do the same on other forums I administer. Knowing "what" and "when" helps the staff from chasing a moving target.
1. Computer OS
2. Browser, and version
3. Exact time and date the slowdown (so they can check against the server logs)
3A. The page, the thread or post, or the function at the exact time of the slowdown. ("Making a post in the Xxxxx thread," or "Reading the 'new posts' page," for example.)
4. Exactly what happens. "Slow" doesn't mean anything on its own. Is part of the page loading, and then nothing happens? Is the page fully loaded, and a progress indicator shows its waiting for something (such as, when uploading a photo or entering a post)? This might indicate if it is an external server causing the page to hang (ad network, social media button), or if there is a delay on the server.
Your IP address is captured when you post, and also shows up in a log of IP addresses you have visited from, so it's possible they may not need it. For many of us, we access from the same IP address or, in the case of mobile, my IPs on mobile probably show a varying address, but one which belongs to the carrier I use (Project Fi). The reason staff may need an IP address is to do a reverse traceroute, and see if it is a network issue from your device to the host, and also a traceroute from the host back to your device. It is not uncommon for these to take two separate routes, depending on how the host has their routing configured.
I know it seems like an abundance of details, but if I can look at a member's reported information (date and time) and match it against something like the server logs, I could see if there is any correlation between my site and the issue at hand. Admins don't mean to make "busy work," but having more information beyond "the forum is slow" is likely the only means an admin has to try to track it down.
I don't notice any delays at all on the forum. On a computer I am running with ad blockers, but, not on my phones or the tablet (where I only occasionally visit AK--the bulk are via computer). But, give the guys here a li'l more information and it'll help them track down whatever seems to be a problem for some of the visitors here.