Having read the comments of Olive Starr, a few things need to be highlighted.
Of all LeMonds Tour victories, 1990 would be the most suspicious considering where he was at the Tour de Trump as Starr mentioned. In 89(this seems to get ignored a lot)LeMond actually had very good early season, Top 10 Tour of Americas, Criterium International, Tirreno-Adriatico and 16th at Het Volk. His form then just seemed to desert him overnight and he started to struggle again but he was never as bad as he was in 1990.
LeMond did come into the 1990 season badly overweight and out of shape, he really struggled through the first half of the season as Starr noted. However it wasnt training that saw LeMond progress rapidly as Starr suggested, it was that old fashioned style of getting in shape, racing, lots of racing.
The Tour de Trump finished on May 13, LeMond then started the Giro on May 18, he was still far from top form but was active getting in an 139kn break in the mountains on stage 15. The Giro finished on June 6 and LeMond then started the Tour of Switzerland June 13-22 in which he finished 10th overall. The Tour started on June 30th and the first major encounter was the TT on stage 7. In a 7 week period up to the end of Switzerland, LeMond raced for 40 days!!! Thats more than some current GT riders do in a season and his progression is linear.
In modern day racing, we have exactly the opposite. Riders not racing and heading of on training camps and then showing up at the Tour in shape. Racing and suffering was always considered the best way of getting in shape but that all changed with the advent of EPO.
I like the way that Starr lables ALL euro pros as dopers yet he never raced there. He seems to be trading of limited stories from others. Does he know for fact that guys like Mottet, Delion, Helvetia were dirty or is he falling into the easy(they all do it) trap based on what a few people say.
I would never rule out the possibility of LeMond doping but until we get something from more relevant people than Starr, I reserve judgement.