Which ebook seller offers the highest and fastest royalties?

I've managed to publish at both Amazon and Smashwords and the actual royalties receive range between 60% to 75%. But if you want the highest royalties, I believe Kbuuk currently is offering the highest royalty rate at 80% for free users and 100% royalty rate for premium users. You can check it out at http://kbuuk.com.

Money withdrawal is theoretically faster if you can reach the minimum payout amount of 50 U.S. dollars. You can get the amount via Paypal within 48 hours unlike Smashwords which will pay you on a quarterly basis once you reach their 10 dollar threshold (Aggregated for all currencies), or Amazon which pays you via check 60 days (two months) after you reach the 100 dollar threshold per currency (You need to reach 100 US, 100 GBP, 100 EUR to get the check for each).

So if you're an indie author looking for alternatives, I would suggest that you diversify and test all publishing platforms and see which one is best for you.