There were really only two countries that have rates that are comparable to Canada, and the U.S. has a comparable rate. I guess you could view it that the parent companies of both MasterCard and Visa are located there and it is tough negotiating packages.
There have been some reductions on the debit side which was a runaway cost by comparison to Canada, but the answer is that it's comparable on the U.S. side. Multiple other jurisdictions, like India, China, Israel, and Switzerland, have moved on this though, so I'm not sure that in this case we would look to the U.S. as a sort of an inspirational beacon on it.