@dimalifragis,
Ok thank you for the list. I only see SQLs, which gets option values from wp_options table. These are very small queries with 0.0003 sec execution time. All together is 0.0075 sec. This is something you can ignore without any worry. The real and serious SQLs like posts, topics, users getting SQLs don't exist. A one of such SQL may take ten times more seconds than the 25 options getting SQLs.
Moreover, all these 25 SQLs should be cached, and they are cached in our test websites. The SQLs should work once, not on each page loading. For some reason they are not cached on your forum. We'll take a deep look in the core for the next update. As additional information that could help us, please attach a list of all plugins you use (in a txt file).