I'm not saying people are filtering on seeing "I", but they would be surprised in the same way they would be by seeing third person "Thom is a CTO with..." on a CV.
I have no agenda here. I'm just telling you the facts from someone who has probably read far more resumes than most others. You don't need to accept my expertise. Again, run a google image search on resumes, tell me how many you see with the word 'I'.
You clearly don't value my experience. That's OK. I'm not some advocate for first person pronouns - it doesn't help me in any way that resumes are written in this manner. I'm just explaining to you that it's a fact.
This isn't the #1 piece of advice I give in my job. I'm a writer. I write the documents. I'm not telling them what to do.
I do offer review services, which are a small part of my business. If I get a resume with the word "I" for a review, I will tell them what I've told you.
You seem intent on belittling what I do, as if my job is to walk around telling people "don't use I".