But you didn't give an opportunity to non-switch owners to see the results at least. (We all want to see the results of polls).  That fact alone will bias your answers as they'll pick whatever they want just to see results.  The key to designing a good poll is to consider all the options and to isolate people.  Either way your results aren't going to be conclusive, but you'll at least allow those who want to play fair to have a place to play their piece.  This seems like your first poll and in time you'll understand the nuances. There's never a perfect poll, and self surveys are some of the most unreliable of all statistics, but you'll at least steer your data into more accurate directions with options for everyone.

On this website.

VGChartz' Wii U sell-through estimates for 2012 and 2013 are in the correct ballpark because they have been verified with shipment data. The currently estimated sell-through for Switch lacks the same doublechecks because more official data has yet to be made available, but the more reliable sales trackers in Japan (Media Create, Famitsu) and the USA (NPD) have Switch beating Wii U with ease in a launch-aligned comparison, so any reasonable estimate for worldwide sales has to show the same. The Japanese trackers show Switch performing at 25-30k units per week whereas Wii U was 5-10k, NPD has Switch at over 200k per month whereas Wii U did ~50k.

VGC's accuracy can and should be doubted, but the margin between Wii U and Switch is so tremendous that it's 100% clear that the latter system is outselling the former by multiple times after the launch period. The Wii U's holiday launch makes things look much closer than they really are. The more sales data comes in, the clearer it gets that the two systems aren't playing in the same league.

Nintendo announces shipment data every three months in their financial reports; the next one is due in late July. But Nintendo also considers Media Create and NPD perfectly valid and uses them as sources for sell-through graphs, so there's no reason to doubt the numbers of these sales trackers.

Not saying you are wrong, but where can I find sold though numbers?

Where are you getting 4x the pace?   Wii U sold 3 million units by the end of December 2012.    Even if that were the case it doesn't necessarily mean the majority of people buying the Switch never own/owned a Wii U.  Now don't get me wrong it probably has more interest than the Wii U did to people outside the hardcore fan base, but there isn't enough data to show how much of an impact its had on the more mainstream market.