the problem with greipel at HTC is the majority of his wins were at smaller events, against less opposition. Lets take his GTs:
He has won 2 Girostages, and 4 Vuelta:
He won 1 Giro stage in last years edition AFTER Farrar, Pettacchi and a couple of the other sprinters had pulled out - before, out of 2 sprints against farrar and patacchi he hadnt even managed 1 podium! Hardly the best thing to boast about, managing 1 win against a field that didn't have any of the best 3 sprinters in, even if it was the giro. His other Giro stage was in 2008, again without Farrar/Pet in the race,and this time it was one gifted to him by Cav to say thanks (this was back when they at last kind of got along) - and Cav finished 2nd in the sprint. So Giro? Hardly anything to crow about, when considering the curcumstances.
And he has 4 Vuelta stages too:all 4 came in 2009, where again, there was no Cav and Farra, and for 2 of them, no Farrar (or again, the other sprinters who pulled out). So again, yes, there were 2 results, but not against any of the other top sprinter, and even then, he lost 2 times against a non-top field (including one where he was outsprinteed by Anthony Roux and William Bonnet!). The other 2 were won against a Cav and Petacchi-less field, but Farrar ws there (despite having already done the other 2 GTs and using it as warmup which is why he pulled out halfway through) - and although he did win 2 of the stages, he also lost 4 sprints (3 of which weren't even won by farrar, he was not at his top of his form!).
So in conclusion,he is a rider who has managed to win 6 GT stages, of which 4 were against a sub-par field (for GT sprints), and the 2 that he did win were up against only Farrar (not at full form), where he also lost 4 sprints to the likes of Bennatti, Henderson, Sabbatini and Bozic - hardly the palmares of someone who could call themselves onwe of the best 3 sprinters in the world. The rest of his results have largely been in thhe likes of the tour of Turkey. and TDU. To think that he would therefore materialise as the biggest threat to Cav's dominance in sprints, especially considering he *does* rely on a train as much as Cav, and is on a team with at least 2 other goals, is frankly ridicuous
The 1 thing he has learnt this year, and has shown him in a more positive light, is his willingness to work for others during stages - probably because lotto realise he is not one of the top sprinters, so are trying to adjust his expectations and his role as a result