I just did site optimization with JCH Optimizer. Got Page Speed in to the 80's, which with Java-heavy extensions such as RT and JReviews is pretty good. It took hours, checking JReviews JS files one by one and excluding them. RokGallery gave me a lot of problems. I had to place the JavaScript files at the first Java tag which is something I didn't have to do with other sites.
This post
http://www.reviewsforjoomla.com/forum/index.php?topic=19072.0
details what I had to do. I still have to do a CDN and compress background images.
I am very happy with the results. RT templates and JReviews are probably two of the "heaviest" extensions for Joomla! and it's great to get them working together with a good Page Speed score.
BTW: the "remember me" box: There are posts all over the forum about this, most of them unanswered, because there are a few that RT devs DID answer. You can turn off input styling or add '#rt-popuplogin' to the input styling exceptions. Keep in mind that FireFox will NOT automatically fill in the password. There are lots of complaints about this. I don't know if it's a RT problem or a FF problem.
[EDIT] I am not using an RT template anymore on this project. Not that there were any problems, it's just that for this particular project I need page speed scores in the 90's, which I am afraid is impossible with JReviews+JomSocial+RT. One of them had to go... [/EDIT]