Fast is relative. OK, go to the settings and select in the Speed settings Cable/DSL as your connection speed and then go to Uploads -> Basic. Start to shift the Upload Bandwidth slider from the right to the left in small steps and stop if your internet is no longer slow. Note: you must press Apply on every change and wait about 10-20 seconds to see the effect.

Note: You don't have more search results or better download speeds in UltraPeer mode, it's just luck.