I don't understand what you mean by "load". There is some additional html -sure. But the number of table cells remains the same for the post, the only change is the number of table tags and the html for the table wrapper. If you are viewing 50 posts per page you'll spend more time waiting for the data to come out of the database than you will waiting for the html to go from client to server...
Last, but not least, if you have Zlib compression enabled in your config (and you should) then the added html won't make any difference...