Everything looks fine to us and we haven't had any other reports of slow load times. I'm not sure what else to suggest that hasn't already been mentioned here, so I hope it resolves for you soon!
I've had times where tbt doesn't load when I go on the page from a different page, so you're not the only one. Sometimes it'll take a little longer to load threads as well. Sometimes, not all the time. I use my phone primarily just cause it's closer and I'm more used to it. My laptop is big so I hardly ever use it.
On my phone (as always) forum has been loading slower than normal since the new event was announced. Threads and replies take longer to load/post. I was having slight issue yesterday but today it's nearly every reply/thread.
The forum is loading slowly for me today as well. I haven't had much of an issue until today, but it usually gets slow for me on days/times where there is heavy traffic. With the new event week announced and it being a weekend, I figure that's why it's running slower than usual.