Also Dezl 560 is based on Nuvi 2460 hardware and software! No problem with ASR (attention - not ASR2) on both device:

<DataType><Name>ASR</Name><File><Specification><Identifier>ASR</Identifier></Specification><Location><Path>.System/ASR</Path><FileExtension>asr</FileExtension></Location><TransferDirection>InputOutput</TransferDirection></File></DataType>
<UpdateFile><PartNumber>006-D0807-00</PartNumber><Version><Major>2</Major><Minor>10</Minor></Version><Path>.System/ASR</Path><FileName>English_British.srd</FileName></UpdateFile>