The press release itself even says "1.2GHz dual-core ARM-based processor"
I guess directly from the linked article: "[..] RAM is a generous 4Gb so it shouldn’t choke on lots of open sockets like lesser devices. [..]"
It doesn't take GBs of RAM to handle boatloads of open sockets. My 54GS with 32MB of RAM would handle multiple wired machines running torrent clients without any slowdown (when running a 2.4.x kernel).