Ann: Appendix 4D and Half Year Financial Report, page-12

There should be no such lag for revenue: From the prelim report - revenue recognition

Rendering of services
Revenue from a contract to provide services is recognised by reference to the stage of completion of the contract or on a time and materials basis depending upon the nature of the contract.
Support and maintenance revenue is recognised on a straight-line basis over the period of contract.
In multiple element arrangements where goods and services are sold as a bundled product, the fair value of the services component is recognised as revenue over the period during which the service is performed.