These pages should be deleted as soon as possible if they have been legitimately labelled for speedy deletion. Valid reasons for speedy deletion are obvious vandalism, leftover/unused redirects (it is your job to make sure that they are unused) and pages that are causing problems for Wikipedia such as copyright/license violating textdumps. Do not delete a page that might be an honest attempt by a new contributor. Sometimes new editors create new pages and then discover that they cannot make a useful contribution.
Ntlawa lowu eka nkarhi wa sweswi, wuhava matluka kumbe swifaniso.