The objectives of this study were twofold: (1) Determine the English proficiency of English second-language learners (ELLs) at the end of preschool as referenced to monolingual norms, and in particular, to determine if they showed an asynchronous profile, that is, approached monolingual norms more closely for some linguistic sub-skills than others; (2) Investigate the role of home language environment in predicting individual differences in children's English proficiency. Twenty-one ELL children (mean age = 58 months) from low socio-economic status (SES) backgrounds with diverse first-language backgrounds participated in the study. Children's English proficiency was measured using a standardized story-telling instrument that yielded separate scores for their narrative, grammatical and vocabulary skills. A parent questionnaire was used to gather information about children's home language environments. The ELL children displayed an asynchronous profile in their English development, as their standard scores varied in terms of proximity to monolingual norms; narrative story grammar was close to the standard mean, but mean length of utterance was below 1 standard deviation from the standard mean. No differences were found between the story-telling scores of the Canadian-born and foreign-born children, even though Canadian-born children were exposed to more English at home. Implications of the findings for clinicians and educators working with young ELLs are discussed. (author abstract)