I doubt this. Majority holders are probably not yet aware of this poll. If we make an effort and make them aware and win the poll, then Blockstream might back out again and say "bitcoin is not democracy", "mere winning wont do, you need 90%+" etc.
You can't expect everyone in the ecosystem to vote on a poll, that is absurd. You try to get as many people as you can and then draw to conclusions. You have the link now, go try and find these 'majority holders' that are against it. As it currently stands there is more than 80% support for Core.
I have created polls on bitcoinocracy before you heard about it. I also know who created bitcoinocracy and what other sites he run. So, u dont need to boast "You have the link now". This type of arrogant and I know everything attitude of Blockstream has forced the community to stand in front of split today and your patron Adam Back is crying on twitter not to leave the minority behind. So, behave properly.
Coming to the point, there needs to be a clear message from Blockstream core that they'd accept the defeat and move to 2mb before we "find these 'majority holders' that are against it". It requires an effort to send the message across as majority holders do not surf bitcointalk or /r/bitcoin anymore. So, we need the confirmation that the effort will be worthwhile to change the arrogance of Blockstream.