Nutrition recommendations and interventions for diabetes:  a position statement of the American Diabetes Association   http://care.diabetesjournals.org/content/31/Supplement_1/S61.full.pdf+html

Two-hour post-meal (post-prandial) blood glucose levels should be less than <7.8 mmol/L (<140 mg/dl).

Self-Monitoring of Blood Glucose in non-insulin treated type 2 diabetes. 2006.  http://www.idf.org/webdata/docs/SMBG_EN2.pdf