Agreed, I regularly browse and post on Bitcointalk on mobile, haven't come across any issues, except the scrolling from left to right. (though not really an issue IMO)
Then again, I usually browse other websites in desktop mode, so I'm probably somewhat weird in that regard.
I'm personally fine with Bitcointalk on mobile when I'm reading posts. The scrolling from left to right is easily fixed by using landscape mode on my phone. What bothers me a lot though, is when I'm posting or replying to quotes. Formatting quotes to make my reply look clean is too much of a hassle as you'd have to manually erase the irrelevant stuff.