Never saw a 6lbs pounder that would be huge!

One "sees" all sorts of claims out there. Most are hype and/or inedible. 2 lb. tomatoes are fairly common but more than that are often fused fruit, deformed, ugly and rot before ripening.

Tomatofest.com has a nice mixed "giant" variety selection and his article explains the role of pruning to one fruit, excessive feedings, etc.

Dinner Plate is the only one I have ever tried of his selections. Giant Belgium is another good one.

Dave

Here is a link that might be useful: Gary Ibsen's Giant tomatoes