I try to avoid forming opinions on matters that aren't subject to opinion, like whether you can use “an” before “historic” and whether you can use “there’s” before “a lot of people here.” But the key word is "try." Just because I know a usage is acceptable doesn't mean I like it. I have my own unfounded, not-backed-up-by-reality peeves and prejudices. I usually keep mum about them. No point raving about the wrongness of something that's right. Still, some correct usages irk my inner pedant. I wrote about them in my most recent column.