Er bod llawer o’r darpar fabwysiadwyr yn fodlon ar y gwasanaeth a gânt, mae eraill yn anfodlon. Tra bo rhai darpar fabwysiadwyr yn croesawu’r gefnogaeth a’r cysuron a gynigir iddynt yn ystod eu hymholiadau cynnar ynghylch mabwysiadu, mae eraill yn canfod yr asiantaethau mabwysiadu yn araf i ymateb i’w hymholiadau dechreuol. Mae’r dystiolaeth yn awgrymu bod darpar fabwysiadwyr mewn gwahanol rannau o’r wlad yn cael eu gwrthod, neu’n symud trwy’r broses asesu yn rhy araf, oherwydd nad ydynt, ar yr union adeg dan sylw, yn bodloni anghenion penodol yr asiantaeth fabwysiadu y gwnaed y cais iddi; mae hyn yn dangos diffyg o ran cydgysylltu’r galw a’r cyflenwad cyffredinol.
Many prospective adopters are satisfied with the service they receive, but there are those who are not.  While some prospective adopters receive welcoming reassurance and support during their initial enquiries into becoming an adoptive parent, others find that adoption agencies respond slowly to initial enquiries. Evidence suggests that prospective adopters in different parts of the country find that they are rejected, or make slow progress in the assessment process because they do not meet the particular, immediate needs of the agency to which they have applied; demonstrating an overall lack of co-ordination of supply and demand.