Hello!
I am not shure, but i bet this topic has been discussed often on the bladeforum.
If you look back over some of the old posts you will find them. Use the search utility of the forum.
To answer your question from my (not very objective) point of view:
The potential to get a better performing blade is increased if the blade is forged in a proper way. BUT it has to be said that this is only one of many factors determining the quality of a blade. And even forging can ruin a potentially good piece of steel if done improperly.
Otherwise read the tests performed for example by Ed Fowler, who used 52100 steel and made 4 similar blades using stock removal versus forging technique and doing single and mulitple heat treat. You will see that in all tests the otherwise exactly similar forged blades allways outperformed the stock removal blades by far.
For me performance is not the only reason to forge my knives. The bladesmith has much more artistic freedom when forging a blade and/or the handle. You simply can move the metal where you want. Plus you have the possibility to recycle lots of things made of very good steels, like roller bearings, which are otherwise not very usefull in the hands of a stock removal knifemaker.
Achim