Statistics published by the Ministry of Justice on Freedom of Information in central Government for 2008 show that of a total of 554 non-routine requests received by the Department (based on aggregated quarterly data) 88 per cent. (485) received a substantive response within 20 days. 92 per cent. (511) of requests were dealt with 'in time', that is within 20 days by meeting the deadline or other permitted extension deadline.
The statistics can be found on the Ministry of Justice website at:
http://www.Justice.gov.uk/publications/freedomofinformationquarterly.htm and copies are available in the House Libraries.