It doesn't take significantly longer for me (I just did a side-by-side comparison and couldn't tell the difference), though I have Google Fiber at home and pretty fast Internet at work. I also didn't notice the ads until you pointed that out and don't consider them particularly annoying.

That said, if these are persistent stumbling blocks then by all means don't use this service. If Goodsearch took 2-3 seconds more than Bing/Google for me I would certainly not use it.