That claim may be exaggerated or a hoax, but the wallet site Blockchain.info (not the bitcoin blockchain!) is under some stress, it seems:

http://www.reddit.com/r/Bitcoin/comments/2npw4p/blockchaininfo_has_an_onion_url_now_or_is_this_a/
http://www.reddit.com/r/Bitcoin/comments/2npu1p/blockchaninfo_herding_users_on_to_rogue_tor_nodes/
http://www.reddit.com/r/Bitcoin/comments/2npmyr/security_flaw_do_not_use_blockchaininfo_api_when/
http://www.reddit.com/r/Bitcoin/comments/2npil2/blockchaininfo_has_deliberately_hijacked_all_tor/