I can't read that because I am at work lol.
If you ever did any level editing for HL1 and HL2 you would notice huge similarities between the way things work, yet the source engine is definatley a new engine! That it uses 2 threads, and 1Gb doesn't mean anything, the fact that you can change the properties of the exe to increase it to 4gb prove this... The "esm" file extention means nothing! So they chose the same three letters as last time..? Wow, they must have used the same engine! I'll point out the Hl1 and Hl2 engines again, they used much the same file extensions, (take a look at the files for compiling levels, they were very similar for both).
As someone above said, there is no way you can tell how new the engine is unless you take a look at the source code. Which no on is going to do. You can't tell by looking at exe properties, esm files etc. If it was built by the same people its going to be similar design etc than before.
When the level editor comes out you are going to squeal because it will look similar to the old one. Well duh, they are going to make it similar
everyone who works there knows how to use it. Huh, same as HL
Also, as someone said, wouldn't it be a massive risk for Bethesda to basically steal a game engine? Unless they have some secret deal with Gamebryo. If anyone found out they would be sued millions!
http://en.wikipedia.org/wiki/GamebryoHave you noticed someone has edited the Gamebryo wikipedia page and added Skyrim? lol