Miyamotoo on 06 March 2017
"There wasn't a huge number of units pushed into the channel (most major retailers are sold out) and the marketing and PR campaign was truncated and arrived late in the day. Retailers tell us that they were very happy with the launch and one store even declared: "Nintendo is back."
http://www.gamesindustry.biz/articles/2017-03-06-strong-start-for-nintendo-switch-in-the-uk
