I somewhat disagree.
The order goes like this:
1. com (duh)
2. net (still strong, still the 2nd most used after com)
3. org (multiple organisations/non profit co and still going strong)
......now here comes the tricky part...........................
The three extensions above have been in use for many many years. One may agrue that if "this" extension (info,biz,whatever) came out at the same time as the golden trio, then things would be different.
maybe....but thats now the case is it? Right now everything else is new and worst yet, unknown to the average internet user.
Every other extension gTlds, ccTlds, altenativeTlds, need a hell of alot of marketing and TIME to even scratch the surface of the mountain that the golden trio reside on.
Look at how much $$$$$$$ .TV spend, how much marketing its done, and what? where is it now?
and what about .CC?
The fact of the matter is this now one will know that 4rth,5th,6th,7th,8th,9th..... ranked extension will be for a While.
but being an ICAAN approved Gtlds (like the golden trio) the .info and .biz have much better chance of being in the top 5. (even outranking one or two of the golden trio tlds).
everything else, in my opinion is just another of many ccTlds, and alternative Tlds, that even though maybe better "fitting" extenions (like the .tv and the altTld .web) will always be looking up at the mountain peak of accepted, known, preferred TLDs.
well that was my 3 cents (gave a cent as a tip)