IDC cuts its 2013 IT spending growth forecast to 4.9% from 5.5%, citing macro issues and weak PC demand; 2012 growth was 5.6%. Gartner, which includes a bigger array of products/services in its numbers, forecast 4.1% growth last month. IDC now sees U.S. software spending (MSFT, ORCL) growing 6%, down from a prior 7%. Storage hardware revenue (EMC, NTAP) is only expected to grow 2.4%, down from 2012's 6.1%, and carrier spending on networking gear (CSCO, JNPR, ALU, CIEN) is expected to grow just 1.1% vs. 5.8% in 2012. Recent earnings reports and warnings (I, II, III, IV) help explain the subdued outlook.