Let's not forget Palace were only getting 12-13k in 2011/12 and now fill Selhurst. If Millwall got to the top flight 30k in a top stadium is very achievable.
As I said previously there is nothing at that ground or around it that appeals to the average middle class family that are now the biggest demographic in Southwark. People are actually going to Palace because the football is a better standard but if the match day experience was akin or better...
And we couldn't fill Withdean....
To be honest being a local to Millwall and with young kids the current Den is pretty hostile in terms of surrounding area and match day facilities. Palace unfortunately are drawing loads of new young fans because of Premier League football in the area so...