red_flanders said:
			
		
	
	
		
		
			This should be cut and paste every time someone starts talking about the various transformations we see in cycling.
		
		
	 
I recall 5% being the typical improvement reported in the early EPO days, so it's clearly a very significant performance boost. It was certainly enough to convert LeMond from a Tour winner to an also-ran.
As a bit of an aside, Wiggo was 4s faster in the Athens IP than Brad McGee. So all other things equal, Sir Brad had a 5% power advantage over the other Brad, who did quite well in the Giro that year. 
Maybe this puts the GT potential of a top IPer into a different perspective. If the other Brad can get a top 10 in the Giro, is it so unreasonable for a guy with 5% more power to perform at Sir Brad's level in a GT?
Note to Dear Wiggo - please note my previously stated suspicions of Sir Brad. The question above is just a question not a religiously held belief that Sir Brad is the Second Coming.