Will my client really care if they are posted on CMR Group, LLC.?

Quite frankly, some clients will care and others will not. However, both of these situations can be advantageous to you. How?

If your client reacts negatively to being posted (which is the goal), then chances are extremely high that the client will pay their debt.
If your client appears not to care about being posted, then it will be up to you to judge whether or not the client is a legitimate one (i.e., it's possible they don't care about the debt being posted, because they never had any intention of paying in the first place). This will confirm, sooner, that your client should be placed with a third party agency, thus increasing your recovery percentage by identifying the account earlier.