I think that my newbie gains were definitely recovering what was already there from when I was younger. Not that I was complaining! This is one type of newbie gain. I think a fair few people get these, especially us older PEers (damn I am only 33:P) and trust me a hard penis is worth more than an extra soft half inch when it comes to sex.
I also think that there is probably quite a few people who have not lost anything (either young, very healthy, or just fortunate) yet also have not got to 100% of their current attainment, simply because they haven’t stretched themselves out properly to give themselves maximum extension. These people can gain that initial extra after a small period of time. These are what I first thought was meant as newbie gains.
I think for a lot the above two gains blend into each other. On one hand, who cares how it happens as long as it happens! The worst thing that can happen is that you get a nicely conditioned penis that is healthy and ready for slow and steady regular gains. That is were I am now. The gains are smaller but are far more satisfying due to the long term commitment and ‘beyond your physical ability’ nature.