As for the front page banner, I always like looking at those numbers when first getting on to see changes and compare overall stats from the different regions from a distance. Also, as Vienna pointed out, I will use this sites main page to show people the stats which in turn introduces people to the site. Those stats are what introduced me to the site even!
For sig banners, they don't matter as its on the front page. I say keep the front page banner, but if your question is about sig banners, they can go if you like.