I disagree with that massively.
Batting wise the Aussies will need Clarke and Hussey to bat for hours and hours and hours in England. Warner and Hughes have (maybe had in Hughes case) serious technical issues. Cowan is nothing special and whats more, they are all lefties and England undoubtedly prefer bowling at lefties than right. Warner averaged in the 20's on his only soiree outside Australia. That kind of batsman, a slogger primarily is not suited to Test match cricket in England. He's like Gayle or Sehwag, who average 34 and 27 in England. Then you have the likes of Watson, who as a batsman is nothing more than average. He's a 50 and out guy that buckles under the scrutiny of good Test match bowling.
Bowling wise they look decent enough but none of their young bowlers look absolutely incredible. Cummins is the pick but appears to be very injury prone. I like Starc and Pattinson looks decent enough but they aren't sending the 1980's West Indies quartet are they here. Siddle and Hilfenhaus still play ! I thought they'd be put out to pasture after England rocked up 600 - 1 and 500 - 3 etc on their own wickets. The mere fact that they likely come back to England for the next Ashes tells you all you need to know about Australia right now. Their spin option is likely to be Lyon....I mean come on !
Australia have one superstar in Clarke who is absolutely exceptional and Hussey is brilliant as well, although his biggest quality is that he appears to love batting against England. Those two will need to carry Australia in 2013 IMHO. They'll be competitive because its the Ashes but if England bowl anything like, Australia will seldomly put 400 up in the first innings and that will largely end their hopes.
There's a few issues here.
1. Warner's issues are more tempramental than technical. He occasionally snicks them, but most batsmen do, he certainly doesn't have many glaring problems like Hughes did to certain deliveries. He's a hot and cold player, a bit like Jayasuria at test level, but make no mistake, he will probably smash a run a ball century at some point in the series, that could have the potential to win a match.
Warner knocked a maiden ton on a greentop in Hobart, not to dissimilar to the worst of English conditions, when everyone else was dropping like flies. Underrate him at your peril imo.
2. As for the bowling attack, they are all young, and have had their fair share of injury problems. Pattinson is definately the best bowler of the 3, his style suits English conditions perfectly, he swings the new and old ball, and he's more than a few yards sharper than Anderson. Starc reminds me a bit of a young Morkel, all over the joint, but had alot of potential, will extract the most natural bounce, along with Finn, both could be a handful for the Australian/English batsmen.
Pattinson/Starc/Siddle will be the bowling attack imo, Hilfenhaus was dropped for the Perth test imo and is more likely cover imo, Cummins could be a trump card if he manages to get some fitness between now and July, he's only been sat down as a precaution, so it's possible he might make the trip, and considering how much he swung the ball in South Africa, and he's the quickest bowler of both counties, the English would be hoping he doesn't make the trip imo......
Steyn's the only bowler in world cricket capable of bowling high 140's and swinging it consistently atm, Pattinson is just a yard slower, but has similar capabilities. Cummins was bowling 150km/h and swinging it as a 17 year old, add to that he's 6"6, you get my drift basically.............
I think the English coaches would be more worried about the Australian battery, than the other way around personally.
Australia has the best bowling attack of the two nations imo.