BY IAN OLGEIRSON, KAGAN The cable industry is burying concerns over DSL price cuts, posting impressive customer growth without substantial drops in revenue per sub. Comcast, adding nearly half a million new data subs, flaunted its advantage while indicating there is plenty of growth ahead before a low-end tier needs to be introduced. Telephony proved the exception for the upbeat Comcast, posting substantial declines in customers in favor of cash flow increases, reaching 15% in Q3. The depth of its retooling exceeds expectations and there are few assurances of a speedy return to growth next year. VoIP in 2005 promises to provide the trigger.