No, certainly more time has passed. AGOT alone covers about a year. ACOK and ASOS together covers at least a year, probably more. The last two books are mostly in parallel.
According to this site ( http://awoiaf.westeros.org/index.php...f_major_events
), 3+ years have passed since the AGOT prologue.
Stretching it out to 1 year per season (in terms of kid actors aging) is not a giant stretch, and will probably benefit the narrative anyway - especially for Arya's arc.