it's been hit & miss ime. If the company retained a general public means of contacting them after the switch specifically for "customer support" & not just sales or tech, chances are good that the timely communication will be positive.
I default to not expecting much from most companies, which also drives the search for lowest spent cost possible for the product. I'd rather be out little cash & expect nothing for support than to spend big bucks & "hope" customer support is great if needed.