Speculation? He could teleport to Kaio-sama's planet (another dimension even!), by doing it with Cell, and by teleporting there to find New Namek, because Namekians don't have far sensable energies.
He sensed the Namekian´s energy, that´s why he said, it´s too far away insteed of saying I cannot sense them. The funny thing about heaven and H.F.I.L in DB is that they are in the same universe at different planet´s.
True... But if you go outside the Manga he can use it in a fight (movie 6 - against Metal Coola)
That is non-canon, you could see Yamucha (in heaven) beating Olibou and an other guy. Olibou was slight weaker than Pikkon who knocked Sk. Seru in one hit.
So that would make Yamucha stronger than Seru, and also chibi Boo the strongest Boo.
SSJ3 Gokou stronger than chou Gohan ect. -- This is why nnon canon is unrealible.
That fact is a little inconsistent, because Goku made it over the snakeway in his normal form before fighting Vegeta, in 1 day, that speed is VERY close to SSJ Gotenks' speed if you say he made it 7 laps around the world... well clearly that is an inconsistency.. The same goes for Buu finding Goku and Vegeta
Yes Akira retconned the fighter´s from time to time.
A blast from Bejiita (Fruiza saga) aimed on Fruiza would destroy the entire Namek.
While SSJ3 Gokou deflect a blast from Majin Boo and it just whipes out 10% of the earth.
Speed is also like that, he incressed and removed it from time to time.
Gokou as a child lifted one ton.
Gokou after Seru saga couldent lift 40* ton´s as easiley.
Sorry you're maybe not familiar with the concept of
Warp Speed (read Warp Velocity). A fictional concept from Star Trek though... It's not infinite but several times the speed of light.
When I refere to warp speed, I also refere to the warping ability.
Such as serval Marvel/DC cosmic were capable to.