Exhibit 23 We consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 333-11139, 333-11191, 333-11195, 333- 57643, 333-57641, 333-85247, 333-48672 and 333-48670) of our report dated February 2, 2001, with respect to the consolidated financial statements and schedule of Boston Communications Group, Inc. included in the Annual Report (Form 10-K) for the year ended December 31, 2000. /s/ Ernst & Young LLP Boston, Massachusetts March 26, 2001