In reply to Ian84:
A big step. How big depends on if you are a climber or not I guess. I did the W3000 in reverse simply to enjoy the scrambling going up - Tryfan, Bristley ridge and Crib goch, did it carrying full bivvy kit in a heatwave and took 24 hours inc a bivvy sleep and it was tough. Skye was way harder but different technically, as already said its loads of climbing and route finding is tough, forget it if the cloud is down. Water is a problem as is daylight. It took me until 3rd attempt to crack it.
My advice to you, in a perfect world, would be to have a week up on skye in late spring as the weather can be tropical (for skye) and have a day doing the TD gap, Kings chimney and in pinn as roped climbs. Another day doing the spur and once on the ridge do some further exploring around this difficult to route find middle section. Another day perhaps doing the traverse of gillian will get you ok with the tooth and the walk out.
Then its up to you, 2 days or 1? I've done both and given the choice again I'd do one every time as I know I can do it so why take a back breaking ammount of kit when I don't have to? The TD gap can be bypassed quite easily as can kings chimney by opting to do collies ledge, these dodges alone can save several hours if its busy up there. It is acceptable and you should have already had ticked these bits earlier in the week. You know what to expect at the in pinn if you'd done it earlier in the week so can solo it if confident.
Take a look at the skye guides web page, mike has a 'tips for success' download to help you. If time or partners are short condsider booking one of mikes guides for the route. It'll be the best money you've ever spent on climbing.
Just A.N.Other giving point of view but there you go.