SEO/SEM Paying Off

Nice Center For Media Research article on how SEO and SEM have been paying off for advertisers. Good sound bytes:

28.0% of merchants report more than 25% of their site traffic stems from paid search advertisements, while 51.5% say more than a quarter of their traffic comes from natural search

37.7% of respondents spent more than 50% of their online marketing budget, 11.9% spent 61% to 75%, and 20.8% spent more than 75%, according to the Internet Retailer survey of IRNewsLink e-newsletter readers conducted with e-mail marketing and survey firm Vovici Corp.

27.0% report more than 50% of their online sales are attributable to search engine marketing