I'm glad I'm not the first CC person to state that I talk this way sometimes too...and I turn around and correct myself too. LOL
My mom was VERY strict about the way we kids talked...she corrected us often---especially in saying the correct noun to verb useage.
What surprises me greatly, is that our children----on occasion, have spoken as though they've never heard the correct way to speak.
"There's many over there'....(for example) makes my skin crawl....and I find myself saying to them,
"It's not there's many'...it's 'there ARE many'......heck, I even see this mistake in newspapers and on TV ads. Really bugs me....and it has nothing to do with 'black or white'...but more, IMO, with anyone not taking the time to learn to say it correctly.
Do I speak too quickly or in a slang-mode sometimes? Sure I do.
But I've found my children will pick up on commercials, etc......and if I don't correct them....well, you understand.
While one child was much younger and attending speech, I spoke to the therapist about this. Your example of 'where's it at?'....is common when children are much younger, I think.
It's trying to have them see the difference when they're older that's the task! The color of skin makes no difference.
Sincerely,
Linny