Yes. much better than any of yours.
Penrith had no farkin choice dipstick, they had no Cap space available so they had to let him go. Much like Melbourne had to let Inglis go, that doesn't exactly match your methodology.
BULLSHIT (capitals for emphasis), Thurston had lots of potential but wasn't regular NRL standard when he signed for the Cowboys. His defence was almost non existent at the start of the 2004 season, up to then his injury record wasn't great, he was considered too small for the rigors of week in week out NRL. At that time Sherwin and Anasta were both better players as well as being NRL proven. FWIW Thurston was 21 in 2004, not 18.
Don't get me wrong I was as pissed off as anyone that we let him go, but no one that I know of had a good enough crystal ball to see what he would develop into.
Who gives fark how old he is, do I rely have to give you a list of the halves that did next to nothing until their mid 20's, the list would be endless. How about just Melbourne players for example, Cronk was 27 when he played his first SOO, Munster was 23, Kimmorley was 24 and FMD Hughes was 26 before he had even played in the NRL halves.
Always a Bulldog