::::::No it is actually not. If a researcher, an academic, says "I estimate X to be Y", it's not up to you to show here and decide "that's just an opinion, I, as a random anonymous Wikipedia editor proclaim it so and remove this!". We really don't need Wikipedia users to be going around reinterpreting reliable sources to their liking - see original research.  
 ::::::Btw, "one to ten percent", in my opinion, looks like an interval that admits lots of uncertainty. Maybe you'd have a point if the source claimed it was 7.4345537% or something, but not in this case.  
 ::::::And like I said, you've more than violated the three revert rule on this article. The only reason I haven't reported you is because I'm assuming you're new and not aware of it. But you really shouldn't be accusing others of "edit warring" (which actually suggests that you are in fact aware of the rule).